Question

answer it in 2min ....

Answer 1

If x + 4 is a factor then it must divide the whole equation.

So, x + 4 = 0.

x = -4 is a root.

Upon solving p(x) = 0
by putting value of x as -4


4(-4)³ -b(-4)² -7(-4) +372 = 0

-256 + 16b + 28 +372 = 0

16b + 144 = 0

16b = -144

b = -9

So, your answer is -9.



Thank you.