Question

a) 7×-3×
b) -8y³+2y³
c) -2n-5n
d) -2m-m+4m
e) -7a+7a-5a
f) 3xy²-4xy²+9xy²
g) 3abc-2abc+7abc
h) 6t²-4t²-2t²
i) 2m-3/4m
j) 1/2×-1/3×
k) -3/2a+3/4a​

Answer 1

Resposta:

Explicação passo a passo:

A) 7×-3×

= 7x - 3x

= 4x

__________

b) -8y³+2y³

= - 6y³

___________

c) -2n-5n

= - 7n

____________

d) -2m-m+4m

= - 3m + 4m

= m

____________

e) -7a+7a-5a

= - 5a

______________

f) 3xy²-4xy²+9xy²

= 12xy² - 4xy²

= 8xy²

______________

g) 3abc-2abc+7abc

= 10abc - 2abc

= 8 abc

____________

h) 6t²-4t²-2t²

= 2t²- 2t²

= 0

_____________

i) 2m - 3/4 m

= ( 2 - 3/4 ). m

= (4.2 - 3)/4 . m

= (8-3)/4 . m

= 5/4 . m

= 5m/4

___________

j) 1/2×-1/3×

= X/2 - x/3

Mmc (2,3)= 6

= (3x - 2x)/6

= x/6

_____________

k) -3/2a+3/4a

= (- 3/2 + 3/4 ). a

Mmc (2,4)= 4

= [2.(-3) + 1.3]/4 . a

= [-6 + 3]/4 . a

= - 3/4 . a

= - 3a/4

________________