a, (X+y)mu 2-(x-y)mu 2 Thu gon bieu thuc b,(x+y)mu 3 -(x-y) mu 3 29/10/2021 Bởi Ivy a, (X+y)mu 2-(x-y)mu 2 Thu gon bieu thuc b,(x+y)mu 3 -(x-y) mu 3
`a, (x+y)^ 2-(x-y)^ 2` `= x^2+y^ 2-x^2-y^ 2` `=0` `b, (x+y)^ 3-(x-y)^3` `= x^3+y^3-x^3-y^3` `=0` Bình luận
Đáp án: a) ( x + y )^2 – ( x – y )^2 = x^2 + y^2 – x^2 – y^2 = 0 b) ( x + y )^3 – ( x – y )^3 = x^3 + y^3 – x^3 – y^3 = 0 học tốt! Bình luận
`a, (x+y)^ 2-(x-y)^ 2`
`= x^2+y^ 2-x^2-y^ 2`
`=0`
`b, (x+y)^ 3-(x-y)^3`
`= x^3+y^3-x^3-y^3`
`=0`
Đáp án:
a) ( x + y )^2 – ( x – y )^2
= x^2 + y^2 – x^2 – y^2
= 0
b) ( x + y )^3 – ( x – y )^3
= x^3 + y^3 – x^3 – y^3
= 0
học tốt!