(x-3)^3 + (3-x) 14x^2y – 21xy^2+28x^2y^2 4x (x+1 ) – 8 (x+1) 7x (x-y) – (y-x) 10x (x-y ) – 8y (y-x) 20/08/2021 Bởi Kaylee (x-3)^3 + (3-x) 14x^2y – 21xy^2+28x^2y^2 4x (x+1 ) – 8 (x+1) 7x (x-y) – (y-x) 10x (x-y ) – 8y (y-x)
Đáp án: Giải thích các bước giải: – $(x-3)^3+(3-x)$$=(x-3)^2-(x-3)$$=(x-3)(x^2-6x+9-1)$$=(x-3)(x^2-2x-4x+8)$$=(x-3)(x-2)(x-4)$– $14x^2y-21xy^2+28x^2y^2=7xy(2x-3y+4xy)$– $4x(x+1)-8(x+1)=4(x+1)(x-2)$– $7x(x-y)-(y-x)=7x(x-y)+(x-y)=(x-y)(7x+1)$– $10x(x-y)-8y(y-x)=10x(x-y)+8y(x-y)=2(x-y)(5x+4y)$Chúc bạn học tốt !! Bình luận
`(x-3)^3 + (3-x)` `=(x-3)^3-(x-3)` `=(x-3)[(x-3)^2-1]` `=(x-3)(x-3-1)(x-3+1)` `=(x-3)(x-4)(x-2)` `14x^2y – 21xy^2+28x^2y^2` `=7xy(2x-3y+4xy)` `4x (x+1 ) – 8 (x+1)` `=2(x+1)(x-2)` `7x (x-y) – (y-x)` `=7x(x-y)+(x-y)` `=(x-y)(7x-1)` `10x (x-y ) – 8y (y-x)` `=10x (x-y ) + 8y (x-y)` `=2( x-y )(5x+4y)` Bình luận
Đáp án:
Giải thích các bước giải:
– $(x-3)^3+(3-x)$
$=(x-3)^2-(x-3)$
$=(x-3)(x^2-6x+9-1)$
$=(x-3)(x^2-2x-4x+8)$
$=(x-3)(x-2)(x-4)$
– $14x^2y-21xy^2+28x^2y^2=7xy(2x-3y+4xy)$
– $4x(x+1)-8(x+1)=4(x+1)(x-2)$
– $7x(x-y)-(y-x)=7x(x-y)+(x-y)=(x-y)(7x+1)$
– $10x(x-y)-8y(y-x)=10x(x-y)+8y(x-y)=2(x-y)(5x+4y)$
Chúc bạn học tốt !!
`(x-3)^3 + (3-x)`
`=(x-3)^3-(x-3)`
`=(x-3)[(x-3)^2-1]`
`=(x-3)(x-3-1)(x-3+1)`
`=(x-3)(x-4)(x-2)`
`14x^2y – 21xy^2+28x^2y^2`
`=7xy(2x-3y+4xy)`
`4x (x+1 ) – 8 (x+1)`
`=2(x+1)(x-2)`
`7x (x-y) – (y-x)`
`=7x(x-y)+(x-y)`
`=(x-y)(7x-1)`
`10x (x-y ) – 8y (y-x)`
`=10x (x-y ) + 8y (x-y)`
`=2( x-y )(5x+4y)`