Question

Resolva:

√144 + √36 - 2³

√80 + √190 - 5³

√15 + √18 - 9²

Answer 1

(I)

$= \sqrt{144} + \sqrt{36} - 2 {}^{3}$

$= 12 + 6 - 8$

$= 18 - 8$

$\boxed{ = 10}$

(II)

$= \sqrt{80} + \sqrt{190} - 5 {}^{3}$

$= \sqrt{4 {}^{2} \: . \: 5} + \sqrt{190} - 125$

$= \sqrt{4 {}^{2} } \sqrt{5} + \sqrt{190} - 125$

$= 4 \sqrt{5} + \sqrt{190} - 125$

$≈8,94 + 13,78 - 125$

$≈22,72 - 125$

$\boxed{≈ - 102,28...}$

(III)

$= \sqrt{15} + \sqrt{18} - 9 {}^{2}$

$= \sqrt{15} + \sqrt{3 {}^{2} \: . \: 2} - 81$

$= \sqrt{15} + \sqrt{3 {}^{2} } \sqrt{2} - 81$

$= \sqrt{15} + 3 \sqrt{2} - 81$

$≈ 3,87 + 4,24 - 81$

$≈8,11 - 81$

$\boxed{≈ - 72,89...}$

Att. NLE Top Shotta

Answer 2

Resposta:

√144 + √36 - 2³

√144 = 12,√36 = 6

= 12 + 6 - 2³

= 18 - 2³

= 18 - 8

= 10

_______________

√80 + √190 - 5³

= 4√5 + √190 - 5³

= 4√5 + √190 - 125

_______________

√15 + √18 - 9²

= √15 + 3√2 - 9²

= √15 + 3√2 - 81