Question

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

3x^2+18x=21


Multiply both sides of the equation by 1/3 .

Add 9 to each side of the equation.

Multiply both sides of the equation by 1/9 .

Add 81 to each side of the equation.

Answer 1

Ans: Multiply both sides of the equation by 1/3 .

3x^2 + 18x = 21
Multiply both sides of the equation by 1/3 . [because coefficient of x^2 must be 1]
x^2 + 6x = 7