Question 671320
{{{(3x+1)(4x^2-2x+5)}}}
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Apply a form of FOIL
{{{3x(4x^2) - 3x(2x) + 3x(5) + 1(4x^2) + 1(-2x) + 1(5)}}}
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{{{12x^3 - 6x^2 + 15x + 4x^2 - 2x + 5}}}
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Combine like terms
{{{highlight_green(12x^3 - 2x^2 + 13x + 5)}}}

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