Question

упростите
а) 3√2+3√8-√98
б) (3√2)+ (2√48)
в) (2-√3)²
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Answer 1

$\bf \: a). \: \: 3 \sqrt{2} + 3 \sqrt{8} - 2 \sqrt{98} = 3 \sqrt{2} + 3 \sqrt{2 \times 2 \times 2} - 2 \sqrt{7 \times 7 \times 2} = 3 \sqrt{2} + 6 \sqrt{2} - 14 \sqrt{2} \huge = - 5 \sqrt{2} ; \\ \bf \: b). \: 3 \sqrt{2} + 2 \sqrt{48} = 3 \sqrt{2} + 2 \sqrt{16 \times 3} \huge = 3 \sqrt{2} + 8 \sqrt{3} ; \\ \bf \: w). \: {(2 - \sqrt{3} )}^{2} \huge = 4 - 4 \sqrt{3} + 3.$