Question
Multiply the following: $(ab + c), (ab + c)$
✓
Answer
$(ab + c), (ab + c)$
$(ab + c)(ab + c)$
$= ab(ab + c) + c(ab + c)$
$= a^2b^2+ abc + cab + c^2$
$= a^2b^2+ 2abc + c^2$
$(ab + c)(ab + c)$
$= ab(ab + c) + c(ab + c)$
$= a^2b^2+ abc + cab + c^2$
$= a^2b^2+ 2abc + c^2$
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