Question

Which of the following are solutions to the equation x^2 - 49 = 0?

*Check all that apply*

A. -7
B. 2
C. -14
D. 49
E. 7
F. 14

Answer 1

x^2 - 49 = (X+7)(X-7)

Answer 2

So it's 7 and -7?

Answer 3

keep in mind that \(\bf (a^2-b^2) = (a-b)(a+b)\)

Answer 4

yeap

Answer 5

(X+7)(X-7) = 0

x+7 = 0 => x = -7
x-7 = 0 => x = 7

Answer 6

Just 7 and -7? I hate it when they give me 18,000 other options -.- smh

Answer 7

well, the idea is not to pick one out, the idea is that you evaluate the expression, then it doesn't matter how many they give you, you know which is which

Answer 8

True... lol much apprectiation though thanks