Question

√13²-5²=

√12²+16²=

√2·3²+7·3²=

√9·5²-8·5²=

raspunsurile va rog ? ​

Answer 1

$\bf \sqrt{13^2-5^2} =\sqrt{169-25} =\sqrt{144}=12$

$\bf\sqrt{12^2+16^2} =\sqrt{144+256} =\sqrt{400} =20$

$\bf \sqrt{2 \cdot 3^2+7 \cdot 3^2} = \sqrt{3^2(2+7)} = \sqrt{9 \cdot 9 } =9$

$\bf \sqrt{9 \cdot 5^2-8\cdot 5^2} = \sqrt{5^2(9-8)} =\sqrt{5^2} =5$

Answer 2

√13²-5²=12

√12²+16²=20

√2·3²+7·3²=9

√9·5²-8·5²=5

Sper ca te am ajutat!