Question

the root of equations x²+4x-21=0​

Answer 1

Answer:

-3 and - 7

Step-by-step explanation:

X²-4x-21 =0

X²-7x+3x-21

X(x-7) + 3(x-7)

(x+3)(x+7)

-3 and - 7 are roots of the equation