Phan tich da thuc thanh nhan tu a,3xy-3y+x-1 b,x^2-2x+1-9y^2 06/08/2021 Bởi Charlie Phan tich da thuc thanh nhan tu a,3xy-3y+x-1 b,x^2-2x+1-9y^2
a, 3xy-3y+x-1 =3y(x-1)+(x-1) =(x-1)(3y+1) b, x²-2x+1-9y² =(x²-2x+1)-9y² =(x-1)²-(3y)² =(x-1-3y)(x-1+3y) (Học tốt nhé!) Bình luận
a, 3xy-3y+x-1
=3y(x-1)+(x-1)
=(x-1)(3y+1)
b, x²-2x+1-9y²
=(x²-2x+1)-9y²
=(x-1)²-(3y)²
=(x-1-3y)(x-1+3y)
(Học tốt nhé!)