Question

02. Calcule o valor das expressões
a) (0,2)2+(0,1)2=
b) (2,5)2- (0,3)2=
c) (1,2)3+(0,4)2-1,887=
pfvr min mandei o cálculo e a resposta no final do cálculo ​

Answer 1

Resposta:

$a) \: \: (0.2) {}^{2} + (0.1) {}^{2} = \\ ( \frac{1}{5} ) {}^{2} + 0.1 { }^{2} \\ ( \frac{1}{5} {}^{2} + ( \frac{1}{10} ) {}^{2} \\ \frac{1}{25} + ( \frac{1}{10} ) {}^{2} \\ \frac{1}{25} + \frac{1}{100} \\ \frac{1}{20} \\ \\ b) \: \: (2.5) {}^{2} - (0.3) {}^{2} = \\ 2.5 {}^{2} - 0.3 {}^{2} \\ (\frac{5} {2}) {}^{2} - 0.3 {}^{2} \\ (\frac{5} {2}) {}^{2} - (\frac{3} {10} ) {}^{2} \\ \frac{25}{4} - ( \frac{3}{10} ) {}^{2} \\ \frac{25}{4} - \frac{9}{100} \\ \frac{154}{25} \\ \\ c) \: \: (1.2) {}^{3} + (0.4) {}^{2} - 1.887 = \\ 0.4 {}^{3} + 0.4 {}^{2} - 1.887 \\ ( \frac{5}{6} ) {}^{3} + 0.4 {}^{2} - 1.887 \\ ( \frac{5}{6} ) {}^{3} + ( \frac{2}{5} ) {}^{2} - 1.887 \\ ( \frac{5}{6} ) {}^{3} + ( \frac{2}{5} ) {}^{2} - \frac{1887}{1000} \\ \frac{216}{125} + ( \frac{2}{5} ) {}^{2} - \frac{1887}{1000} \\ \frac{216}{125} + \frac{4}{25} - \frac{1887}{1000} \\ \frac{1}{1000}$

Explicação passo-a-passo:

Espero ter ajudado!!!