Ivanna is solving a quadratic equation. She wants to find value of x by taking the square root of both sides of the equation. Which equation allows her to do this?

a. x^2 + 14x + 49 = 16

b. x^2 - 12x - 36 = 47

c. x^2 + 49x + 14 = 42

d. x^2 + 4x - 21 = 25

Question

26 March, 08:10

+3

Answers (2)

Know the Answer?

Haylie Schroeder · Answer 1

I believe it's A. That's the only one that has a proper square root on both sides.

Connor Carrillo · Answer 2

a. x^2 + 14x + 49 = 16 correct answer

x^2 + 14x + 49 is a complete square

x^2 + 14x + 49 = (x+7) ²

(x+7) ²=16

√ (x+7) ²=+/-√16

Ivanna is solving a quadratic equation. She wants to find value of x by taking the square root of both sides of the equation. Which equation allows her to do this?a. x^2 + 14x + 49 = 16b. x^2 - 12x - 36 = 47c. x^2 + 49x + 14 = 42d. x^2 + 4x - 21 = 25