Identify Like Terms: Identify the like terms in the expression. The like terms are 7b^2 and -10b^2 because they both contain the variable b raised to the power of 2.Combine Like Terms: Combine the like terms by subtracting the coefficients. 7b^2 - 10b^2 = (7 - 10)b^2Perform Subtraction: Perform the subtraction of the coefficients. 7 - 10 = -3 So, 7b^2 - 10b^2 = -3b^2

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$7b^2 - 10b^2$

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7b^2 - 10b^2

Identify Like Terms: Identify the like terms in the expression. $\newline$ The like terms are $7b^2$ and $-10b^2$ because they both contain the variable $b$ raised to the power of $2$ .
Combine Like Terms: Combine the like terms by subtracting the coefficients. $7b^2 - 10b^2 = (7 - 10)b^2$
Perform Subtraction: Perform the subtraction of the coefficients. $\newline$ $7 - 10 = -3$ $\newline$ So, $7b^2 - 10b^2 = -3b^2$