Question

[Phạm Đỗ Bảo Ngọc]

bÀI 36;

1, 2( x + y) - 5a( x+ y )

2, a mũ 2 ( x- 5 ) - 3 ( x- 5 )

3, 4x (a -b ) +  6xy( b - a )

4, y (a - b) -x (b -a)

5, 6x(x - y) + 8y( y - x)

6, 4( x - 3 ) mũ 2 - 2x ( x- 3)

Answer 1

[Nguyễn Huy Tú]

1, \(2\left(x+y\right)-5a\left(x+y\right)=\left(x+y\right)\left(2-5a\right)\)

2, \(a^2\left(x-5\right)-3\left(x-5\right)=\left(a^2-3\right)\left(x-5\right)\)

3, \(4x\left(a-b\right)+6xy\left(b-a\right)=\left(4x-6xy\right)\left(a-b\right)=2x\left(2-3y\right)\left(a-b\right)\)

4, \(y\left(a-b\right)-x\left(b-a\right)=\left(x+y\right)\left(a-b\right)\)

5, \(6x\left(x-y\right)+8y\left(y-x\right)=\left(x-y\right)\left(6x-8y\right)=2\left(3x-4y\right)\left(x-y\right)\)

6, \(4\left(x-3\right)^2-2x\left(x-3\right)=\left(x-3\right)\left[4\left(x-3\right)-2x\right]=2\left(x-3\right)\left(x-6\right)\)

Answer 2

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