Question

(3√5-4√2) (3√5+4√2)

Answer 1

$(3 \sqrt{5} - 4 \sqrt{2} )(3 \sqrt{5} + 4\sqrt{2})$

$45 - 32 = 13$

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Answer 2

Step-by-step explanation:

$by \: using \: formula \: ({x}^{2} - {y}^{2} ) = (x + y)(x - y) \\ so \: \\ (3 { \sqrt{5} }^{2} - 4 { \sqrt{2} }^{2} ) \\(9 \times 5 - 16 \times 2) \\ 45 - 32 \\ = 13 \: ans$

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