Question

ddfgrthtth

Answer 1

Use FOIL:
\[\begin{align}(2\sqrt{5}+3\sqrt{7})^2&=(2\sqrt{5})^2+2(2\sqrt{5})(3\sqrt{7})+(3\sqrt{7})^2\\
&=20+12\sqrt{35}+63\\
&=83+12\sqrt{35}
\end{align}\]

Answer 2

but then how does 83 + 12 sqrt35 equal 153.99?

Answer 3

Try plugging this in a calculator. :D

Answer 4

Omg, thank you so much! Can you help me with one more question?

Answer 5

Go ahead.

Answer 6

No problem. :D