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what is $8x^2$ plus $7x^2$

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Square roots of perfect squares

Full solution

Q. what is

8x^2

plus

7x^2

Combine like terms: Combine like terms by adding the coefficients of $x^2$ . $\newline$ Calculation: $8x^2 + 7x^2 = (8+7)x^2 = 15x^2$

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