Question

Which of the binomials below is a factor of this trinomial?
3x2 + 18x-21
O A. X-3
O
B. X-1
O c. x+1
O D. X+ 3
SUBMIT

Answer 1

Answer:

B. X-1

Step-by-step explanation:

$3x^2 + 18x-21$

Factor out common term : 3

$=3\left(x^2+6x-7\right)\\\\Factor\: : x^2+6x-7\right \\\\=3\left(x-1\right)\left(x+7\right)$