Question
Using the standard formulae, expand:
$\left(\frac{a}{2}+\frac{b}{3}+\frac{c}{4}\right)^2$
$\left(\frac{a}{2}+\frac{b}{3}+\frac{c}{4}\right)^2$
✓
Answer
$\frac{a^2}{4}+\frac{b^2}{9}+\frac{c^2}{16}+\frac{a b}{3}+\frac{b c}{6}+\frac{a c}{4}$
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