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Please help -2x(4)^3+6x^2-3x-9

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The expression -2x³ + 6x² - 3x - 9 solved for x = 4 is -53

How to evaluate the expression for x = 4

From the question, we have the following parameters that can be used in our computation:

-2x³ + 6x² - 3x - 9

Also, we have

x = 4

Substitute the known values of x into the expression

So, we have

-2(4)³ + 6(4)² - 3(4) - 9

Expand

-2(4)³ + 6(4)² - 3(4) - 9 = -2(64) + 6(16) - 12 - 9

So, we have

-2(4)³ + 6(4)² - 3(4) - 9 = -128 + 96 - 12 - 9

Evaluate the like terms

-2(4)³ + 6(4)² - 3(4) - 9 = -53

Hence, the expression solved for x = 4 is -53

Question

Solve the expression -2x³ + 6x² - 3x - 9 for x = 4

User John Easley
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