Question

Find the value of the expression 2x³-5x²+x+7 for x=(-2)​

Answer 1

✧ Given :-

• x = -2

✧ To Find :-

• The value of the expression 2x³ - 5x² + x + 7 for x = -2

✧ Solution :-

☞ 2x³ - 5x² + x + 7

☞ 2(-2)³ - 5(-2)² + (-2) + 7

☞ 2(-8) - 5(4) - 2 + 7

☞ -16 - 20 -2 +7

☞ -38 + 7

☞ -31

Hence, answer is -31.

Answer 2

Answer:

$\huge { \sf{ 2x³-5x²+x+7}}$

$\sf{→ 2 ( -2 ) ³ - 5 (-2)² + (-2)+7}$

$\sf{→ 2 ( -8 )-5(4) -2+7}$

$\sf{→ -16-20+5}$

$\sf{→ -36 +5}$

$\huge{ \sf{Ans → }} \huge \boxed{ \red{ -31}}$

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