Question

Find the value of the expression: 100 – 10x³ + 5x² at x = -4

Answer 1

Answer:

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Step-by-step explanation:

100- 10(-4 x -4 x -4) + 5(-4 x -4)

100-640+80

-460

Answer 2

Answer:

The value of given equation at $x=-4$ is $20$.

Step-by-step explanation:

Given : The expression is $100-10x^{3} +5x^{2}$

To find : Value of the given expression at $x=-4$

Solution :

• The given expression is,  $100-10x^{3} +5x^{2}$
• We have to find the value of the given expression at $x=-4$.
• To find the value of given expression at $x=-4$, we have to put $x=-4$.
• The expression is,

        $100-10x^{3} +5x^{2}$

•   Put $x=-4$, we get

                    = $100-10(-4)^{2} +5(-4)^{2}$

                    = $100-10*16+5*16$    

                    = $100-160+80$

                    = $20$

• ∴ The value of given equation at $x=-4$ is $20$.