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Anarel [89]
3 years ago
12

(x2+4x+8)+ (2x2 +5x+9)

Mathematics
1 answer:
inysia [295]3 years ago
5 0

Answer:

\left(x^2+4x+8\right)+\left(2x^2+5x+9\right)=3x^2+9x+17

Step-by-step explanation:

Given the expression

\left(x^2+4x+8\right)+\:\left(2x^2\:+5x+9\right)

solving the expression

\left(x^2+4x+8\right)+\:\left(2x^2\:+5x+9\right)

remove the parentheses

\left(x^2+4x+8\right)+\:\left(2x^2\:+5x+9\right)=x^2+4x+8+2x^2+5x+9

Group like terms

                                                   =x^2+2x^2+4x+5x+8+9

Add similar elements: x² + 2x² = 3x²

                                                  =3x^2+4x+5x+8+9

Add similar elements: 4x + 5x = 9x

                                                  =3x^2+9x+8+9

                                                  =3x^2+9x+17

Therefore, we conclude that:

\left(x^2+4x+8\right)+\left(2x^2+5x+9\right)=3x^2+9x+17

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2.5 + 0.5k=2(k + 0.5)
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Answer:

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Step-by-step explanation:

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