Question

Expand and simplify (x+3)(x+5)

Answer 1

$\mathrm{Apply\:FOIL\:method}:\quad \left(a+b\right)\left(c+d\right)=ac+ad+bc+bd$

$a=x,\:b=3,\:c=x,\:d=5$

$\left(x+3\right)\left(x+5\right)$

$=xx+x\cdot \:5+3x+3\cdot \:5$

$=xx+5x+3x+3\cdot \:5$

$=x^2+8x+15$

Answer 2

Step-by-step explanation:

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