Question

me ajudem por favor. ​

Answer 1

Resposta:

a) 3.4 + 5.(-6) = 12 - 30 = - 18

b) 4² - (-6) = 16 + 6 = 22

c) 10.4. (-6) + 5.(4)² - 3.(-6) = - 240 +80 + 18 = - 240 + 98 = - 142

Explicação passo-a-passo:

espero ter ajudado

Answer 2

Sendo a=4 e b=-6

Fazemos cálculos:

A)

$\boxed{\boxed{\begin{array}{lr} \large \sf 3a+5b \\ \\ \large \sf 3\times4+5\times(-6) \\ \\ \large \sf 12+(-30) \\ \\ \large \sf 12-30 \\ \\ \large \sf -18 \end{array}}}$

$\Longrightarrow\boxed{\boxed{\sf -18}}$

B)

$\boxed{\boxed{\begin{array}{lr} \large \sf a^{2}-b \\ \\ \large \sf 4^{2}-(-6) \\ \\ \large \sf 16+6 \\ \\ \large \sf 22 \end{array}}}$

$\Longrightarrow\boxed{\boxed{\sf 22}}$

C)

$\boxed{\begin{array}{lr} \large \sf 10ab+5a^{2}-3b \\ \\ \large \sf 10\times4\times(-6)+5\times4^{2}-3\times(-6) \\ \\ \large \sf -240+80-(-18) \\ \\ \large \sf -240+80+18 \\ \\ \large \sf -142\end{array}}$

$\Longrightarrow\boxed{\boxed{\sf -142}}$

Bons estudos =)