Question

Use the quadratic formula to solve x2 – 4 = 0.
x = -2 or x = 2 x = -2 or x = 4
x = 2 or x = -4 x = -4 or x = -2

Answer 1

use the same formula as the previous question
for this problem a =1 b=0 and c = -4

Answer 2

im so confused

Answer 3

use the values above and plug into the eqn then evaluate