3 years ago

Find the sum of x^2 + 3x and 2x^2 + 9x + 5

1 answer:

8 0

Answer:

$3 {x}^{2} + 12x + 5$

Step-by-step explanation:

$(x^2 + 3x) + (2x^2 + 9x + 5) \\ \\ = x^2 + 3x + 2x^2 + 9x + 5 \\ \\ = {x}^{2} + 2 {x}^{2} + 3x + 9x + 5 \\ \\ = 3 {x}^{2} + 12x + 5$

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qwelly [4]

Answer:

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