## Algebra 1

$30x^{2}$
Given expression : $(-5x)^{2} + 5x^{2}$ This becomes : $(-5x)^{2} + 5x^{2} = (-5)^{2}x^{2} + 5x^{2}$ (since $(ab)^{n}=a^{n}b^{n}$) This becomes : $25x^{2} + 5x^{2} = (25+5)x^{2}$ Final result : $30x^{2}$