Find the product:(9x + 5y) × (4x + 3y)
By horizontal method:
$(9 x+5 y) \times(4 x+3 y)$
$9 x(4 x+3 y)+5 y(4 x+3 y)$
$=36 x^{2}+27 x y+20 x y+15 y^{2}$
$=36 x^{2}+47 x y+15 y^{2}$
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