Question

find the value of m if the expression x⁴-5x³+mx-4 equals -1 when the value of x is -1​

Answer 1

Answer:

m=3

Step-by-step explanation:

x⁴-5x³+mx-4=-1

if x=-1 substitute in above eq.

(-1)⁴-5(-1)³+m(-1)-4=-1

1+5-m-4=-1 ----> (-1)⁴=1 and (-1)³=-1

6-4-m=-1

2-m=-1

-m=-1-2

-m=-3

m=3