Question

QUESTION ❓

Find the value of p(y) = 2y³ - 2y + √7 for y = -2

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Answer 1

$\huge \rm \underline \red{Answer}$

p (y) = 2y³ - 2y + √7

$\therefore$p (-2) = 2 × (-2) -2 × (-2) +√7

= 2 × (-8) -2 × (-2) + √7

= -16 + 4 + √7

= -12 + √7

$\therefore$For y = -2 the value of polynomial is -12 + √7.

Answer 2

p (y) = 2y³ - 2y + √7

\therefore∴ p (-2) = 2 × (-2) -2 × (-2) +√7

= 2 × (-8) -2 × (-2) + √7

= -16 + 4 + √7

= -12 + √7

\therefore∴ For y = -2 the value of polynomial is -12 + √7.