Question

Solve the quadratic equation 84x2+16x=0
by factoring out the GCF.(1 point)
Responses

The solutions are x=−4
and x=−421
The solutions are x is equal to negative 4 and x is equal to negative 4 over 21

The solutions are x=−421
and x=0
The solutions are x is equal to negative 4 over 21 and x is equal to 0

The solutions are x=0
and x=421
The solutions are x is equal to 0 and x is equal to 4 over 21

The solutions are x=0
and x=4
The solutions are x is equal to 0 and x is equal to 4

Answer 1

First factor: 84x^2 + 16x = 4x(21x + 4) = 0.

So 4x = 0 → x = 0, or 21x + 4 = 0 → x = −4/21.

Answer: x = 0 and x = −4/21.