Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(y\cdot\left(x-y\right)-5x+5y=y\cdot\left(x-y\right)-5\cdot\left(x-y\right)=\left(x-y\right)\cdot\left(y-5\right)\)
\(=\left(x-y\right)\left(x+y\right)+5\left(x-y\right)\)
\(=\left(x+y+5\right)\left(x-y\right)\)
Học tốt
\(x\left(x+y\right)-5x-5y\)
\(=x\left(x+y\right)-5\left(x+y\right)\)
\(=\left(x+y\right)\left(x-5\right)\)
x(x+y)-5x-5y
= x.x+x.y-5x-5y
= x^2+x.y-5x-5y
= x.(x-5)-y.(x-5)
= (x-y).(x-5)
Đúng thì k nhak ^3^"""
x(x + y) – 5x – 5y
= x( x+ y) – ( 5x + 5y)
= x(x + y) – 5(x + y) = (x + y)(x – 5)
Câu 1 đề sai rồi bạn ơi
Câu 2/ 5(x2 + 2xy + y2 ) = 5(x +y )2
b ) 5 x ( x - 1 ) - 3x ( x - 1 )
= ( 5x - 3x ) ( x - 1 )
= 2x ( x - 1 )
c ) x ( x + y ) - 5 x - 5y
= x ( x + y ) - 5 ( x + y )
= ( x - 5 ) (x + y )
d ) x ^ 2 + xy + x
= x ( x + y + 1 )
e ) x ( x - y ) + y ( y - x )
= x ( x - y ) - y ( x - y )
= ( x - y ) ( x -y )
= ( x - y ) 2
a, 5x(x-1)-3x(x-1)=(5x-3x)(x-1)=2x(x-1)
b, x(x+y)-5x-5y=x(x+y)-5(x+y)=(x-5)(x+y)
c, x2+xy+x=x(x+y+1)
d, x(x-y)+y(y-x)=x(x-y)-y(x-y)=(x-y)(x-y)=(x-y)2
b)5x(x-1)-3x(x-1)=x(x-1).(5-3)=x(x-1).2
c)x(x+y)-5x-5y=x(x+y)-(5x+5y)=x(x+y)-[5(x+y)[=(x+y).(x-5)
d)x^2+xy+x=x(x+y+1)
e)x(x-y)+y(y-x)=x(x-y)-(x-y).y=(x-y).(x-y)
\(5x^2+3\left(x+y\right)-5y^2=5\left(x+y\right)\left(x-y\right)+3\left(x+y\right)=\left(x+y\right)\left[5\left(x-y\right)+3\right]\)