Question:
Multiply:
(7x + y) by (x + 5y)
Solution:
To multiply, we will use distributive law as follows:
$(7 x+y)(x+5 y)$
$=7 x(x+5 y)+y(x+5 y)$
$=7 x^{2}+35 x y+x y+5 y^{2}$
$=7 x^{2}+36 x y+5 y^{2}$
Thus, the answer is $7 x^{2}+36 x y+5 y^{2}$.
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