Question

simplify :(4 root3 - 3 root 5)^2​

Answer 1

Explanation in the above image...

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Answer 2

Answer:

Using the a-b whole square identity we get

$(4\sqrt{3}-3\sqrt{5} )^{2} = 16*3 + 9*5 + 2 * 4\sqrt{3} *3\sqrt{5}\\=48 + 45 - 24\sqrt{15}\\= 93 -24\sqrt{15}$

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