Question

the value of following polynomial, when x = -2 is 7x⁴+ 3x²-4​

Answer 1

this question is not right at all

Answer 2

Answer:

$7 {x}^{4} + 3 {x}^{2} - 4 \\ 7 ({ - 2})^{4} + 3 ({ - 2})^{2} - 4 \\ 7 \times 16 + 3 \times 4 - 4 \\ 112 + 12 - 4 \\ 124 - 4 \\ 120$

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