Question

The value of the polynomial 7x⁴ + 3x² - 4, when x = - 2 is: *
1 point

Answer 1

Answer:

120

Explanation:

Given,

X = -2

solving the equation,

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

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