Question

1) Efetue: a) (+7x) + (-3x) = b) (-8x) + (+11x) = c) (-2y) + (-3y) = d) (-2m) + (-m) = e) (+5a²) + (-3a²) = f) (+5x) + (-5x) = g) (+6x) + (-4x) = h) (-6n) + (+n) = i) (+8x) – ( -3x) = com conta por favor

Answer 1

a) (+7x) + (-3x) =

$\left(7x\right)+\left(-3x\right)=4x\\\left(7x\right)+\left(-3x\right)\\7x-3x\\4x$

c) (-2y) + (-3y) =

$\left(-2y\right)+\left(-3y\right)=-5y\\\left(-2y\right)+\left(-3y\right)\\-2y-3y\\-5y$

d) (-2m) + (-m) =

$\left(-2m\right)+\left(-m\right)=-3m\\\left(-2m\right)+\left(-m\right)\\-2m-m\\-3m$

e) (+5a²) + (-3a²) =

$\left(5a^2\right)+\left(-3a^2\right)=2a^2\\\left(5a^2\right)+\left(-3a^2\right)\\5a^2-3a^2\\2a^2$

f) (+5x) + (-5x) =

$\left(5x\right)+\left(-5x\right)=0\\\left(5x\right)+\left(-5x\right)\\\5x-5x\\0$

g) (+6x) + (-4x) =

$\left(6x\right)+\left(-4x\right)=2x\\\left(6x\right)+\left(-4x\right)\\6x-4x\\2x$

h) (-6n) + (+n) =

$\left(-6n\right)+\left(n\right)=-5n\\\left(-6n\right)+\left(n)\right\\-6n+n\\-5n$

i) (+8x) – ( -3x) =

$\left(8x\right)-\left(-3x\right)=11x\\\left(8x\right)-\left(-3x\right)\\8x+3x\\11x$

Answer 2

Resposta:

letra a) 4x

letra b) 3x

Letra c) -5y

Letra d) -3m

Letra e) -2 aa em cima da letra A.

Letra f) o

Letra g) 2x

Letra i) 11x.