Question

Find the value of x4 - x3

+ 5 when x = -1

Answer 1

${x}^{4} - {x}^{3} + 5 \\ = { - 1}^{4 } - { (- 1)}^{3} + 5 \\ = 1 - ( - 1) + 5 \\ = 1 + 1 + 5 \\ = 7$
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