Question

${30}^{2} \div {2}^{3} \times {2}^{2} - ( {9}^{2} \div {3}^{2}) + 2 \times \sqrt{16 - 1}$
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Answer 1

Resposta:

30² / 2³ * 2² -(9²/3²)+2 * √(16-1)

900/8 *4 -(81/9) +2 * √15

112,5 *4  -9 +2 * √15

450 -9 +2√15

441+2√15 é a resposta

Answer 2

${30}^{2} \div {2}^{3} \times {2}^{2} - ( {9}^{2} \div {3}^{2} ) + 2 \times \sqrt{16 - 1 = } \\ = {30}^{2} \: \div {2}^{3} \times {2}^{2} - \: \: \: \: \: \: 9 \: + 2 \times \sqrt{16 - 1} = \\ = {30}^{2} \: \: \div \: {2}^{3} \times {2}^{2} - 9 + 2 \times \: \: \: \: \: \: \: \: \: \: \: \: 3 = \\ = \: \: \: \: \: \: 7.200 \times 4 - 9 + 2 \times 3 = \\ = \: \: \: \: \: \: \: \: \: \: \: 28.800 - 9 + 2 \times 3 = \\ = 28.800 - 9 + 6 = \\ = \: \: \: \: \: \: \: \: 28.891 + 6 = \\ = \: \: \: \: \: \: \: \: \: \: \: \: 28.897.$