## Introductory Algebra for College Students (7th Edition)

$12x^4-3x^3+15x^2$
Using $a(b+c)=ab+ac$ or the Distributive Property, the given expression, $-3x^2(-4x^2+x-5) ,$ is equivalent to \begin{array}{l}\require{cancel} -3x^2(-4x^2)-3x^2(x)-3x^2(-5) \\\\= 12x^4-3x^3+15x^2 .\end{array}
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