Question
Find the following product:
$(4 x-3)(2 x+5)$

Answer

$(4 x-3)(2 x+5)$
$=4 x(2 x+5)-3(2 x+5)$
$=(4 x \times 2 x+4 x \times 5)-(3 \times 2 x+3 \times 5)$
$=8 x^2+11 x-15$

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