a, 3x*2+3xy-5x-5y b, 5x*2y-10xy*2 c, x*2-y*2+xz-yz d, (y+4y-5).(x+4) Thank mn nha 30/07/2021 Bởi Aaliyah a, 3x*2+3xy-5x-5y b, 5x*2y-10xy*2 c, x*2-y*2+xz-yz d, (y+4y-5).(x+4) Thank mn nha
a) $3x^2 + 3xy – 5x – 5y$ = $3x(x + y) – 5(x + y)$ = $(3x – 5)(x – y)$ b) $5x^2y – 10xy^2$ = $5xy(x – 2y)$ c) $x^2 – y^2 + xz – yz$ = $(x – y)(x + y) + z(x – y)$ = $(x – y)(x + y + z)$ d) $(y + 4y – 5)(x + 4)$ = $(5y – 5)(x + 4)$ = $5(y – 1)(x + 4)$ Học tốt nhé! Bình luận
a, 3x^2+3xy-5x-5y = (3x^2+3xy)- (5x+5y) =3x(x+y) -5(x+y) =(x+y) (3x-5) b, 5x^2y-10xy^2= 5xy(x-2y) c,x^2-y^2+xz-yz =(x^2-y^2) + (xz-yz) = (x-y) (x+y) +z(x-y) = (x-y) ( x+y+z) d,(y+4y-5).(x+4)=(5y-5).(x+4) =5(y-1) (x+4) Bình luận
a) $3x^2 + 3xy – 5x – 5y$
= $3x(x + y) – 5(x + y)$
= $(3x – 5)(x – y)$
b) $5x^2y – 10xy^2$
= $5xy(x – 2y)$
c) $x^2 – y^2 + xz – yz$
= $(x – y)(x + y) + z(x – y)$
= $(x – y)(x + y + z)$
d) $(y + 4y – 5)(x + 4)$
= $(5y – 5)(x + 4)$
= $5(y – 1)(x + 4)$
Học tốt nhé!
a, 3x^2+3xy-5x-5y = (3x^2+3xy)- (5x+5y)
=3x(x+y) -5(x+y)
=(x+y) (3x-5)
b, 5x^2y-10xy^2= 5xy(x-2y)
c,x^2-y^2+xz-yz =(x^2-y^2) + (xz-yz)
= (x-y) (x+y) +z(x-y)
= (x-y) ( x+y+z)
d,(y+4y-5).(x+4)=(5y-5).(x+4)
=5(y-1) (x+4)