[ toán 8]

B

boboiboydiatran

dễ chương trình đầu lớp 8
bt1
a, (x-3y)^2
b, (-2x-y)^2
c, (x-3y-1)^2
d, ( -2x-y+2)^2
bt2
a, 4x^2-12xy+9y^2
b, 9x^2+6x+1
c, x^2-4xy+4y^2+2x-4y+1
dễ gớm

a,[tex]x^2-6xy +9y^2[/tex]
b,[tex]4x^2+4xy+y^2[/tex]

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S

sam_chuoi

1.a.x^2-6xy+9y^2. b.4x^2+4xy+y^2. c.x^2-6xy+9y^2+6y+1-2x. d.4x^2+4xy+y^2-4y+4-8x.

2.a.(2x-3y)^2. b.(3x+1)^2. c.(x-2y+1)^2. Nhớ thanks nha!
 
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