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  • 09-02-2021
  • Mathematics
contestada

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

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Hrishii
Hrishii Hrishii
  • 09-02-2021

Answer:

[tex] 3 {x}^{2} + 12x + 5[/tex]

Step-by-step explanation:

[tex](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[/tex]

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