a. (8×4 – 10×3 + 12×2-) : 4×2
b. (30x3y2 – 18x2y3 – 6xy4) : (- 6xy2)
c. 2(x + y)3 : ( x+ y )
a. (8×4 – 10×3 + 12×2-) : 4×2 b. (30x3y2 – 18x2y3 – 6xy4) : (- 6xy2) c. 2(x + y)3 : ( x+ y )
By Jade
By Jade
a. (8×4 – 10×3 + 12×2-) : 4×2
b. (30x3y2 – 18x2y3 – 6xy4) : (- 6xy2)
c. 2(x + y)3 : ( x+ y )
`a. (8x^4 – 10x^3 + 12x^2-) : 4x^2=(8x^4:4x^2)+(-10x^3:4x^2)+(12x^2:4x^2)=2x^2-5/2x+3`
`b. (30x^3y^2 – 18x^2y^3 – 6xy^4) : (- 6xy^2) = – 5x^2 + 3xy + y^2`
`c. 2(x + y)^3 : ( x+ y )=(2:1)[(x+y)^3:(x+y)]=2(x+y)^2`
`a,(8x^4 – 10x^3 + 12x^2) : 4x^2`
`= 2x^2 – 2,5x +3`
`b,(30x^3y^2 – 18x^2y^3 – 6xy^4) : (-6xy^2)`
`= -5x^2 +3xy + y^2`
`c,2(x+y)^3 : (x+y)`
`= 2(x+y)^2`
Xin hay nhất !