Sergey is solving 5x2 + 20x – 7 = 0. which steps could he use to solve the quadratic equation by completing the square? check all that apply. 5(x2 + 4x + 4) = –7 + 20 x + 2 = 5(x2 + 4x) = 7 5(x2 + 4x + 4) = 7 + 20 5(x2 + 4x) = –7 x + 2 =

2,3,4 are the answers on edge

Step-by-step explanation:

Option 2 and 3 is correct.

Step-by-step explanation:

Case (I).

Given equation is

Firstly, we will add of 7 in both sides

Now, same variable of opposite sign is cancelled

Now, taking 5 common from left side

Case (II).

Given equation

Firstly, we will add of 7 in both sides

Now, we will add of 20 in both sides

Now, taking common of 5 from left side

So, The next step on solving completing square is and

The scale factor is

Step-by-step explanation:

Yes the figures are similar to each other. The ratio of their linear measurements is in uniform ration

The ration of radius of large cylinder (R) to that of the smaller cylinder (r) is

Like wise the ration of height of large cylinder (H) to that of the smaller cylinder (h) is

The scale factor is