Tính 2x(x - 3) ; (3x + 2)(x^2 - 3x - 5) ; (10x^2y^3 - 5x^3y + 15x^5y^2) : 5xy

----- Nội dung dịch tự động từ ảnh -----
De 1.
Cae 1- Tine a, sx(r -3) b, (x4) (x² 3x - 5)
"Tins a, 2x(z -3) b; (3x42) (x² 3x -5)
C)
22
2 -
a) 4x-g b, 6x't 8xy cy xt- ey - 9 +y
1.
d, x+ 2xy +ry
-4X
bet :
x=o b, 3x(x-2)+ 2x-4=0
Ti, C
a)
-9x
Cau 5 - choABD la hine thang o A//CD À= 60° thi ô=?
- Th, afé te thire x_ 3x a
Cau
clua het cho x-d
20042
Cau 6
b,
X-3
3
4x+12
Red gon a) x=g
Cau -
9 32+9
27x
X43
choA ABC
to AB- Ban, AC=4 ap Irung tuycn AD CDEBC
Câu 8
oo Mua N lân list la lie chiou cua Mhe AB va AC
AD
b) C AD= MN
BC;
the Tư giae BMNe G lanp gi.? ñ Sao ?
2-5
2+2
Cau 9- Tup a).
37046
4-X
b, (x-2)(32-4)
1
Cau 10 - Thy a) 4x (3x2-4xy +Sy
c) (ac"+6xX+9): (x+3)
X+1
X-1