3x^2-3 =5x solve this

 Ans:-

3x^2 - 3 = 5x 

Now we rearranging this expression ax2 + bx + c = 0 in that manner than we get,

3x^2 - 3 - 5x = 0

∴  3x^2 - 5x - 3 = 0

Now we solve this sum by quadratic formula,

1+1-12-12-67-972= What is the answer ?

 Ans:-

1+1-12-12-67-972 = ?

we solved this problem by golden formula of plus and minus

( +, - ). In this formula -1 -1 = -2, 

                                 ∴    -3 -3 = -6,

                                 ∴     1 + 1 = 2, 

                                 ∴     3 + 3 = 6

  ∴  1 + 1 - 12 - 12 - 67 - 972

         ↓                    ↓                   

         2                -1063    

                    

∴       2 - 1063 = 1061

This is our required Ans:- 1061

Find the product of place value and face value of 9 in the year of Independence.

 Ans:-

Year of Independence is 1947

so that, the face value of 9 in 1947 is = 9 

    ∴   the place value of 9 in 1947 is  = 900

Now the product of place value and face value of 9 in 1947 is = 9 × 900

                                                                                                     =  8100

The product of place value and face value of 9 in the year of Independence is = 8100

The ratio of the length of a rectangle to its width is 5:2. If the length of rectangle is 40 cm, what is its width​

 Ans:

Ratio of length and width of rectangle must be in proportion to the actual length and width of the rectangle.

Let we consider width of rectangle be = x

Given:-

Ratio of  Length : Width is = 5 : 2 respectively

Actual Length is = 40 cm

Now we know that, they are in proportion, so we can write them as,

5 : 2 = 40 : x

∴ 5/2 = 40/x

Cross multiplying, we get

5x = 80

x = 16 cm

Therefore width of rectangle is 16 cm.

Expand this expression (p+q²)²​

 (p + q²)²​ 

We solved this expression by this formula (a + b)² = a² + 2ab + b²

(p + q²)²​ = p² + 2pq² + q4

so this is our required Ans:- p² + 2pq² + q4

Hope you will find this answer helpful..!!

There are how many types of electronics in the world ?

If we talk about electronics in the world, than I think that there is no limitation, because every day there new-new features updates we listening isn't ?.

Actually we can't define the limitations of electronics in the world.

But in current times, the types of electronics is,

1. Digital electronics
2. Analogue electronics
3. Microelectronics
4. Circuit design
5. Integrated circuits
6. Power electronics
7. Optoelectronics
8. Semiconductor devices
9. Embedded systems
10. Audio electronics
11. Telecommunications
12. Nanoelectronics
13. Bioelectronics

How to upgrade window 10 home to window 10 pro for free !

 This is quite easy easy and simple tips to upgrade window 10 home to window 10 pro.

A) So first of all we need to uninstall window 10 home activation from our Pc/ Laptop.

B) Secondly to uninstall window 10 home from our Pc/ Laptop by using CMD.

C) Open CMD as an administrator and type command code.

This command code for uninstall window 10 home:

i] slmgr /upk  press Enter button.

ii] slmgr.vbs /cpky  press Enter button.

iii] slmgr /ckms  press Enter button.

iv] slmgr.vbs /ckms  press Enter button.

After applying this above command, you have to restart your PC/ Laptop. 

And again go in your PC/laptop search box and type CMD and open CMD as an administrator.

By using this command code your PC/ laptop upgrade from window 10 home to window 10 pro.

i] slmgr.vbs /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX  press Enter button.

ii] slmgr.vbs /skms kms.teevee.asia  press Enter button.

iii] slmgr.vbs /ato  press Enter button.

Now your PC/Laptop successfully upgraded to window 10 pro.

Distinguish between ordinary and extra ordinary ray

Ans:

Ordinary rays

1) The ray's which obeys Snell's law and laws of refraction is called ordinary ray.

2) It is denoted by O.

3) It passes undeviated through the crystal.

4) Inside the crystal, speed of O-ray is less than E-ray.

5) The speed is constant in the medium.

6) It gives spherical wavefront.

Extra ordinary ray

1) The ray which does not obey the laws of refraction is called extra ordinary ray.

2) It is denoted by E.

3) It deviates after refraction.

4) Inside the crystal, speed of E-ray is more than O-ray.

5) The speed is not constant in the medium.

6) It gives ellipsoidal wavefront.

What is dichroism ?

 Ans:

1) The property by which some doubly refracting crystals absorb the ordinary rays (O-rays) completely and extraordinary rays whole direction is parallel to the optic axis passing through the crystal, is called dichroism.

2) The crystal possessing dichroism property is called dichroic crystal.

3) Dichroism substance produces linearly polarised light 

4) This property of substance is used to construct a Polaroid.

Example: Tourmaline crystal.