Math, asked by kanishka7954, 11 months ago

If X=1/2-^3,find X^3-2x^2-7x+5

Answers

Answered by streetburner

3

Step-by-step explanation:

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X^3-2x^2-7x+5

X= (1/2)(-³) = 2³ = 8

X^3-2x^2-7x+5 = 8³ - 2(8×8) -7(8) + 5

= 512 -128 -56 +5

= 512 - 184 +5

= 512 -179

= 433

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Answered by ask20658

1

Answer: 333

Step-by-step explanation:

X=1/2^-3=2^3=8 we will put 8 in equation.

8^3-2(8)^2-7(8)+5

512-2(64)-56+5

512-128-56+5

=333.

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