Question

Can someone help me simplify (2 square root 5 + 3 square root 7)^2

Answer 1

\[(2\sqrt{5}+3\sqrt{7})(2\sqrt{5}+3\sqrt{7})\] and now 4 multiplications

Answer 2

What do you mean by 4 multiplications?

Answer 3

\[2\sqrt{5}\times 2\sqrt{5}+2\times 2\sqrt{5}\times 3\sqrt{7}+3\sqrt{7}\times 3\sqrt{7}\]
\[4\times 5+12\sqrt{35}+9\times 7\]
\[20+12\sqrt{35}+63\]
\[83+12\sqrt{35}\]

Answer 4

\[(a+b)^2=a^2+ab+ab+b^2=a^2+2ab+b^2\] is what i meant

Answer 5

OHH okay, got it. so then whats after that?

Answer 6

done, i wrote all the steps in all the details above

Answer 7

oh thats it? wow okay thanks again for your help :)