Question

if P is equal to minus 2 find the value of minus 2 p3 - 3 p square + 4p + 7​

Answer 1

Answer:

Given p = -2

Then -2p³ -3p² + 4p + 7 = -2(-2)³ -3(-2)² + 4(-2) + 7

= -2(-8) -3(4) -8 +7

= -16-12-8 +7

= -36+7

= -31

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Answer 2

Simplify:

Step-by-step explanation:

$\ Given \ that:\\\\p= -2\\\\\ find \ the \ value \ of:\\\\-2p^3 -3p^2 +4p +7 \\\\\ Solve:\\\\-2p^3 -3p^2 +4p +7 ................ (i) \\\\\ put \ the \ value \ of \ p \ in \ equation (i)\\\\\rightarrow -2(-2)^3 -3(2)^2 +4(2) +7 \\\\\ -2^3 \ = -2 \times-2 \times-2=-8 \ and \ -2^2= -2 \times -2= 4\\\\\rightarrow -2(-2)^3 -3(-2)^2 +4(-2) +7 \\\\\rightarrow -2(-8) -3(4) +4(-2) +7 \\\\\rightarrow 16 -12 -8 +7 \\\\\rightarrow 4 -8 +7 \\\\\rightarrow -4+7 \\\\\rightarrow 3$

$\ The \ value \ of \ -2p^3 -3p^2 +4p +7 \ = 3$

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