Question

solve and explain step by step. ​

Answer 1

Step-by-step explanation:

this is the answer of your question

Answer 2

Answer:

X+1=0

X= -1

-1 is the zero.

Step-by-step explanation:

=>2x⁴+ 7x³+4x²-7x-9

=>2×(-1)⁴+7×(-1)³+4×(-1)²-7×(-1)-9.

We have replaced x to -1 as it is the zero of the factor.

=>2×1 + 7×-1+4×1+7-9

=> 2-7+4-2

=>-7+4

=>-3

Here is your answer I guess.