Multiply as indicated. Write each product in standand form. $$(2+i)^{2}$$
Added by Ramon R.
Step 1
$$(2+i)^{2}$$ Expanding the square: $$(2+i)(2+i)$$ Using FOIL method: $$4+2i+2i+i^{2}$$ Simplifying: $$4+4i+i^{2}$$ Remembering that $i^{2}=-1$: $$4+4i-1$$ Simplifying: $$\boxed{3+4i}$$ Show more…
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