Question

Solve by factoring or find square root. x^2-3x-4=0

Answer 1

x = -1 and x = 4.

Explanation:

x^2 - 3x - 4 = 0

(x - 4)(x + 1) = 0

x - 4 = 0

x = 4

x + 1 = 0

x = -1

Check your work...

(4)^2 - 3(4) - 4

= 16 - 12 - 4

= 4 - 4

= 0

(-1)^2 - 3(-1) - 4

= 1 + 3 - 4

= 4 - 4

= 0

So, x = -1 and x = 4.

Hope this helps!