Question

Which statement describes the first step to solve the equation by completing the square?

Answer 1

Multiply both sides of the equation by 1/4, because in order to be able to complete the square the first coefficient must be 1. :)

Answer 2

Answer:

Multiply both sides of the equation by $1/4$

Step-by-step explanation:

we have

$4x^{2} +16x=20$

Step 1

Multiply both sides of the equation by $1/4$

$x^{2} +4x=5$

Step 2

Complete the square. Remember to balance the equation by adding the same constants to each side

$x^{2} +4x+4=5+4$

$x^{2} +4x+4=9$

Step 3

Rewrite as perfect squares

$(x+2)^{2}=9$

Step 4

Square root both sides

$x+2=(+/-)3$

$x=-2(+/-)3$

$x=-2+3=1$

$x=-2-3=-5$

therefore

the answer is

Multiply both sides of the equation by $1/4$