find the value of m if the expression x⁴-5x³+mx-4 equals -1 , when x=-1
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Answer:
Value of m is 2
Step-by-step explanation:
=>> x⁴ - 5x³ + mx - 4
Substituting x = -1
=>> (-1)⁴ - 5(-1)³ + m(-1) - 4
=>> 1 - 5(-1) - m - 4
=>> 1 + 5 - m - 4
=>> 2 - m
=>> m = 2
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