Question
Expand the following, using suitable identities.
$ \left(a^2+b^2\right)^2 $
$ \left(a^2+b^2\right)^2 $
✓
Answer
$ \left(a^2+b^2\right)^2 $
$ =\left(a^2\right)^2+\left(b^2\right)^2+2 a^2 \times b^2 $
$ =a^4+b^4+2 a^2 b^2 $
$ =\left(a^2\right)^2+\left(b^2\right)^2+2 a^2 \times b^2 $
$ =a^4+b^4+2 a^2 b^2 $
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