Question
Expand:
$\left(x^2 y-y z^2\right)^2$
$\left(x^2 y-y z^2\right)^2$
✓
Answer
$\left(x^2 y-y z^2\right)^2$
$\left(x^2 y\right)^2-2 x x^2 y \times y z^2+\left(y z^2\right)^2$
$=x^4 y^2-2 x^2 y^2 z^2+y^2 z^4$
$\left(x^2 y\right)^2-2 x x^2 y \times y z^2+\left(y z^2\right)^2$
$=x^4 y^2-2 x^2 y^2 z^2+y^2 z^4$
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