Question

what are the solutions for x^2 - 4 = 0?

a) {0 , -4}
b) {-4, 2}
c) {-2, 2}
d) {0, 2}

I got the answer C, but im not 100% sure

Answer 1

c

Answer 2

rearranging x^2 = 4
so x = +/-2
so x = 2 and x = -2

so c) is the correct answer

Answer 3

it's 100% right.
as x=+2 or -2

Answer 4

okay thanks guys (: