Answer
$5x^3+9x^2-17x+3$
Work Step by Step
$(5x-1)(x^2+2x-3)=5x(x^2+2x-3)-(x^2+2x-3)$
$5x^3+10x^2-15x-x^2-2x+3=5x^3+9x^2-17x+3$
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