How do you rationalize ${(2 \sqrt{5} + 3 \sqrt{7})}^{2}$ $(2sqrt5+3sqrt7)^2$ ?

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Answer 1 · 2015-05-07T13:08:03

Have a look:
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I used the fact that $\sqrt{a} \sqrt{b} = \sqrt{a \cdot b}$ $sqrt(a)sqrt(b)=sqrt(a*b)$

How do you rationalize (2√5+3√7)2(2sqrt5+3sqrt7)^2?