Question

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Answer 1

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Answer 2

$\frac{ {a}^{2} - 36 {b}^{2} }{ {a}^{2} } \times \frac{a}{a + 6b } = \frac{(a - 6b)(a + 6b)}{ {a}^{2} } \times \frac{a}{a +6b } =\frac{a - 6b}{a} =\frac{ \sqrt{32} - 6 \sqrt{50} }{ \sqrt{32} } = \frac{4\sqrt{2} - 30 \sqrt{2} }{ 4\sqrt{2} } = \frac{ \sqrt{2} \times (4 - 30) }{4 \sqrt{2} } = \frac{(4 - 30) }{4 } = \frac{ - 26}{4} = - 6.5$
Ответ : -6.5