Question

Sendo a =-3,b=4 e c=-1.Calcule o valor numérico de:

a)a-bc+2c

b)a^2-3b+7c^3

Answer 1

Sendo a =-3,b=4 e c=-1.Calcule o valor numérico de:

a)a-bc+2c

=>(-3)-(4).(-1)+2.(-1)

=>-3+4-2

=>1-2

=>-1

b)a^2-3b+7c^3

=>(-3)^2-3.(4)+7.(-1)^3

=>9-12+7.(-1)

=>9-12-7

=>-3-7

=>-10

espero ter ajudado!

boa noite!

Answer 2

$\boxed{\boxed{Ola\´ \: \: Gilvania} }$

$\textbf{a)} \: \: a -bc +2c$
$= -3 - 4(-1) + 2(-1) \\ = -3 + 4 -2 \\ = 1 -2$
$= \boxed{\boxed{-1} }} \end{array}\qquad\checkmark$

$\textbf{b)} \: \: a^2 -3b + 7c^3$
$= (-3)^2 -3(4) +7(-1)^3 \\ = 9 - 12 +7(-1) \\ = -3 -7$
$= \boxed{\boxed{-10} }} \end{array}\qquad\checkmark$

$\textbf{Bons estudos}$ !