Question

check whether x+1 is a factor of x³+9x²-4x-12 or not.​

Answer 1

Step-by-step explanation:

hope this helps you better

Answer 2

Step-by-step explanation:

x+1 = 0

X= -1

Now substitute X= -1 in x³+9x²-4x-12

(-1)³ + [9×(-1)²] - [4×(-1)] -12 =0

-1 + (9×1) + 4 - 12 = 0

-1 + 9 + 4 -12 = 0

13 - 13 = 0

0 = 0

so x+1 is a root of x³+9x²-4x-12

HOPE IT HELPS YOU ☺️