Question

Respondam aí por favor botei 100 pontos

Answer 1

a)2

b)3

c)6

d)-30

e)30

O resto n consegui

Answer 2

Explicação passo-a-passo:

.

$5b - 4a$

$a = 3$

$b = - 2$

$c = 5$

$5 \times - 2 - 4 \times 3$

$- 10 - 12$

$- 22$

.

$12 - a + a \times b$

$a = 3$

$b = - 2$

$c = 5$

$12 - 3 + 3 \times - 2$

$12 - 3 - 6$

$9 - 6$

$3$

.

$20a \div 5b$

$a = 3$

$b = - 2$

$c = 5$

$20 \times 3 \div 5 \times - 2$

$60 \div - 10$

$- 6$

.

$abc$

$a = 3$

$b = - 2$

$c = 5$

$3 \times - 2 \times 5$

$- 6 \times 5$

$- 30$

.

$a {}^{2} + b {}^{2} + c {}^{2}$

$a = 3$

$b = - 2$

$c = 5$

$3 {}^{2} + ( - 2) {}^{2} + 5 {}^{2}$

$9 + 4 + 25$

$13 + 25$

$38$

.

$\dfrac{3a}{6} + \dfrac{5b}{2}$

$a = 3$

$b = - 2$

$c = 5$

$\dfrac{3 \times 3}{6} + \dfrac{5 \times - 2}{2}$

$\dfrac{9}{6} - \dfrac{10}{2}$

$\dfrac{9 - 30}{6}$

$- \dfrac{21 \div 3}{6 \div 3}$

$- \dfrac{7}{2}$

.

$\dfrac{5b}{2a} + \dfrac{5a}{2b}$

$a = 3$

$b = - 2$

$c = 5$

$\dfrac{5 \times - 2}{2 \times 3} + \dfrac{5 \times 3}{2 \times - 2}$

$- \dfrac{10}{6} - \dfrac{15}{4}$

$\dfrac{ - 40 - 90}{24}$

$- \dfrac{130 \div 2}{24 \div 2}$

$- \dfrac{65}{12}$

.

$\dfrac{ab}{a -b } + \dfrac{a + b}{ab}$

$\dfrac{3 \times - 2}{3 + 2} + \dfrac{3 - 2}{3 \times - 2}$

$- \dfrac{6}{5} - \dfrac{1}{6}$

$- \dfrac{36 + 5}{30}$

$- \dfrac{41}{30}$