a, 3x(x + 1) – 5y(x + 1)
b, 3x(x – 6) – 2(x – 6)
c, 4y(x – 1) – (1 – x)
d, (x – 3)^3 + 3 – x
e, 7x(x – y) – (y – x)
h, 3x^3(2y – 3z) – 15x(2y – 3z)^2
k, 3x(z + 2) + 5(-x-2)
l, 18x^2(3 + x) + 3(x + 3)
a, 3x(x + 1) – 5y(x + 1) b, 3x(x – 6) – 2(x – 6) c, 4y(x – 1) – (1 – x) d, (x – 3)^3 + 3 – x e, 7x(x – y) – (y – x) h, 3x^3(2y – 3z) – 15x(2y – 3z)^2
By Maya
a) = ( x + 1 ) ( 3x – 5y)
b)= (x-6) (3x-2)
c)= ( x-1) ( 4y + 1)
d) = ( x – 3) [ ( x-3) ² – 1 ]
= (x-3) ( x-3 – 1) ( x-3+1)
= (x-3) ( x-4) ( x-2)
e)= (x-y) ( 7x + 1)
h) = 3x ² ( 2x – 3z ) – 15x ( 2y – 3z ) ( 2y – 3z)
= ( 2x – 3z )[3x ² – 15x ( 2y-3z)
=( 2x – 3z ) [3x ² – 30x + 45xz ]
l) = ( x + 3) ( 18x ² + 3 )
Đáp án:
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