Toán Lớp 7: Thu gọn : C= ( 2x+y) ( 2z +y) + (x-y) (y-2) D= 3x (x-2y) -7/6 y (y-6x) E= 2x (10x^2 -5x-2) -5x (4x^2 -2x -1) F= a (a+1/3) – ( 1/5a +8) -

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Toán Lớp 7: Thu gọn : C= ( 2x+y) ( 2z +y) + (x-y) (y-2) D= 3x (x-2y) -7/6 y (y-6x) E= 2x (10x^2 -5x-2) -5x (4x^2 -2x -1) F= a (a+1/3) – ( 1/5a +8)

Dạ Nguyệt Tháng Một 4, 2023 Toán học 1 Comment 0 views

Toán Lớp 7: Thu gọn :
C= ( 2x+y) ( 2z +y) + (x-y) (y-2)
D= 3x (x-2y) -7/6 y (y-6x)
E= 2x (10x^2 -5x-2) -5x (4x^2 -2x -1)
F= a (a+1/3) – ( 1/5a +8) (5a -11)

Comments ( 1 )

buianhtuan
4 Tháng Một, 2023 at 5:07 sáng

Reply

C=(2x+y)(2z+y)+(x-y)(y-2)

C=4xz+2xy+2yz+y^2+xy-2x-y^2+2y

C=4xz+3xy+2yz-2x+2y

————————–

D=3x(x-2y)-7/6y(y-6x)

D=3x^2-6xy-7/6y^2+7xy

D=3x^2+xy-7/6y^2

————————–

E=2x(10x^2-5x-2)-5x(4x^2-2x-1)

E=20x^3-10x^2-4x-(20x^3-10x^2-5x)

E=20x^3-10x^2-4x-20x^3+10x^2+5x

E=x

————————–

F=a(a+1/3)-(1/5a+8)(5a-11)

F=a^2+1/3a-(a^2-11/5a+40a-88)

F=a^2+1/3a-(a^2+189/5a-88)

F=a^2+1/3a-a^2-189/5a+88

F=-562/15a+88

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