Question

simplifique os radicais

A)√28+2√7

B)√50 - √98

C)√12-9√3+75

ajuda galera

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Answer 1

Explicação passo-a-passo:

A)

$\sqrt[]{28} + 2 \sqrt{7}$

$\sqrt{2 {}^{2} \times 7} + 2 \sqrt{7}$

$\sqrt{2 {}^{2} } \sqrt{7} + 2 \sqrt{7}$

$2 \sqrt{7} + 2 \sqrt{7}$

$(2 + 2) \sqrt{7}$

=>4√7

B)

$\sqrt{50} - \sqrt{98}$

$\sqrt{5 {}^{2} \times 2} - \sqrt{7 {}^{2} \times 2 }$

$\sqrt{5 {}^{2} } \sqrt{2} - \sqrt{7 {}^{2} } \sqrt{2}$

$5 \sqrt{2} - 7 \sqrt{2}$

$(5 - 7) \sqrt{2}$

=>-2√2

C)

$12 - 9 \sqrt{3} + 75$

$12 + 75 - 9 \sqrt{3}$

=>87-9√3