Toán trả lời nhanh giúp mik vs, mik đang gấp. cảm ơn ạ (x+1).(x+y).(x-y).(x-y) 19/09/2021 By Liliana trả lời nhanh giúp mik vs, mik đang gấp. cảm ơn ạ (x+1).(x+y).(x-y).(x-y)
Đáp án: ` (x+1)(x+y)(x-y)(x-y)` `= (x+1)(x-y)(x^2-y^2)` `= (x^2+x-y-xy)(x^2-y^2)` `= x^4 – xy^2 – x^2y -x^3y – x^2y^2 -xy^2 + y^3 +xy^3` `= x^4+ y^3 – 2xy^2 – x^2y -x^3y – x^2y^2 +xy^3` Trả lời
$(x+1).(x+y).(x-y).(x-y)$ $=(x+1).(x-y).(x+y).(x-y)$ $= (x+1).(x^2- y^2).(x-y)$ $= (x^3 + x^2 – xy^2-1).(x-y)$ $= x^4 + x^3 – x^2y^2 – x – x^3y – x^2y + xy^3 + y$ Trả lời
Đáp án:
` (x+1)(x+y)(x-y)(x-y)`
`= (x+1)(x-y)(x^2-y^2)`
`= (x^2+x-y-xy)(x^2-y^2)`
`= x^4 – xy^2 – x^2y -x^3y – x^2y^2 -xy^2 + y^3 +xy^3`
`= x^4+ y^3 – 2xy^2 – x^2y -x^3y – x^2y^2 +xy^3`
$(x+1).(x+y).(x-y).(x-y)$
$=(x+1).(x-y).(x+y).(x-y)$
$= (x+1).(x^2- y^2).(x-y)$
$= (x^3 + x^2 – xy^2-1).(x-y)$
$= x^4 + x^3 – x^2y^2 – x – x^3y – x^2y + xy^3 + y$