Toán Lớp 8: 2a(x + y) – 4(x + y) -2ab(x – y) – 4a(x – y) -2a^2(x – 1) + 4a(1 – x) -3a(x – 3) – a^2(3 – x) GIÚP MK VS MK CẦN GẤP HỨA VOTE 5*

Question

Toán Lớp 8:  2a(x + y) – 4(x + y) -2ab(x – y) – 4a(x – y) -2a^2(x – 1) + 4a(1 – x) -3a(x – 3) – a^2(3 – x) GIÚP MK VS MK CẦN GẤP HỨA VOTE 5*

thanhthuythu · Answer

#Sad   a)   2a(x+y)-4(x+y)   = (2a-4)(x+y)   = 2(a-2)(x+y)   b)   -2ab(x-y)-4a(x-y)   = (-2ab-4a)(x-y)   = -2a(b+2)(x-y)   c)   -2a^2(x-1)+4a(1-x)   = -2a^2(x-1)-4a(x-1)   = (-2a^2-4a)(x-1)   = -2a(a+2)(x-1)   d)   -3a(x-3)-a^2(3-x)   = -3a(x-3)+a^2(x-3)   = (-3a+a^2)(x-3)   = -a(3+a)(x-3)

tuyetnhungthu · Answer

Giải đáp:       Lời giải và giải thích chi tiết:     $ text{2a(x+y)-4(x+y)}$   $ text{= (2a-4)(x+y)}$   $ text{= 2(a-2)(x+y)}$      $ text{-2ab(x-y)-4a(x-y)}$   $ text{=(-2ab-4a)(x-y)}$   $ text{= -2a(b+2)(x-y)}$      $ text{-2a&sup2;(x-1)+4a(1-x)}$   $ text{= -2a&sup2;(x-1)-4a(x-1)}$   $ text{= (-2a&sup2;-4a)(x-1)}$   $ text{= -2a(a+2)(x-1)}$     $ text{-3a(x-3)-a&sup2;(3-x)}$   $ text{= -3a(x-3)+a&sup2;(x-3)}$   $ text{= (-3a+a&sup2;)(x-3)}$   $ text{= a(-3+a)(x-3)}$