a) 4x mũ 2 . ( x- y ) + 9y mũ 2 ( y – x )
b) 4x mũ 3 + 24x mũ 2 – 12xy mũ 2
a) 4x mũ 2 . ( x- y ) + 9y mũ 2 ( y – x ) b) 4x mũ 3 + 24x mũ 2 – 12xy mũ 2
By Reese
By Reese
a) 4x mũ 2 . ( x- y ) + 9y mũ 2 ( y – x )
b) 4x mũ 3 + 24x mũ 2 – 12xy mũ 2
a) 4x² . ( x – y ) + 9y² ( y – x )
= 4x² . ( x – y ) – 9y² ( x – y )
= ( x – y ) ( 4x² – 9y² )
= ( x – y ) ( 4x – 9y ) ( 4x + 9y )
b) 4x³ + 24x² – 12xy²
= 4x ( x² + 6x – 3y² )
CHÚC BẠN HC TỐT, CHO MIK XIN CÂU TRẢ LỜI HAY NHẤT NHA
Bài yêu cầu gì á?
a, `4x^2.(x-y)+9y^2(y-x)`
`=(x-y)(4x^2-9y^2)`
`=(x-y)(2x+3y)(2x-3y)`
b, `4x^3+24x^2-12xy^2`
`=4x(x^2+6x-3y^2)`