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2 years ago

Simplify the following polynomial and write the answer in standard form. (-2x^3+5x^2-4x+8)-(-2x^3+2x-3)

1 answer:

4 0

$(-2x^3+5x^2-4x+8)-(-2x^3+2x-3)\\\\=-2x^3+5x^2-4x+8-(-2x^3)-2x-(-3)\\\\=-2x^3+5x^2-4x+8+2x^3-2x+3\\\\=(-2x^3+2x^3)+5x^2+(-4x-2x)+(8+3)\\\\=5x^2-6x+11$

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3 years ago

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3 years ago

L 5.2.3 Quiz: Two-Variable Systems: Substitution

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Answer:

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Step-by-step explanation:

We need to use the substitution method to solve the system of equations.

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Let:

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Putting value of y from equation 2 into equation 1

$y=10x-9\\Put\:y=x+18\\x+18=10x-9\\x-10x=-9-18\\-9x=-27\\x=\frac{-27}{-9}\\x=3$

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Now, for finding value of y, We substitute the value of x

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Now, putting value of x in equation 1

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2 years ago

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AURORKA [14]

A) 18

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2 years ago

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