Question

(2√5+3√7)^2

Can someone please show me and explain what your doing to get it??

Answer 1

here you have to use this formula:
\[\LARGE (a+b)^2=a^2+2ab+b^2\]
so
\[\LARGE (2\sqrt5+3\sqrt7)^2=?\] can you apply the formula? :)

Answer 2

@mojoman5465

Answer 3

I've tried doing it but Im really confused on how to do it thats whey i asked..

Answer 4

\[\LARGE (2\sqrt5)^2+2[\cdot2\sqrt5\cdot 3\sqrt7]+(3\sqrt7)^2=\]
can you continue any further? :)

Answer 5

\[\LARGE 4\cdot 5+12\sqrt{5\cdot 7}+9\cdot 7 =...\]