Question

The value of the polynomial 7x4 + 3x2 – 4, when x = -2...pls give the correct answer​

Answer 1

$Let \: p(x) = 7x^{4} + 3x^{2} - 4$

$If \: x = -2 \: then$

$The \: value \: of \: p(-2)$

$= 7(-2)^{4} + 4(-2)^{2} - 4$

$= 7 \times 16 + 4 \times 4 - 4$

$= 112 + 16 - 4$

$= 112 + 12$

$= 124$

Therefore.,

$\red{ Required \: value } \green { = 124 }$

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Answer 2

Answer:

120

Step-by-step explanation:

p(x)=7x^4 +3x^2-4

p(-2) = 7(-2)^4 + 3(-2)^2 - 4

= 7*16 + 3*4 - 4

=112 + 12 - 4

=120