Toán Q = x( x – y )+ y ( x – y ) với x = 1,5 ; y = 10 12/07/2021 By Nevaeh Q = x( x – y )+ y ( x – y ) với x = 1,5 ; y = 10
`Q = x( x – y )+ y ( x – y )` `⇔Q=(x+y)(x-y)` `⇔Q=(1,5+10)(1,5-10)` `⇔Q=11,5.(-8,,5)` `⇔Q=-97,75` Trả lời
`#DyHungg` `Q=x(x-y)+y(x-y)` `Q=(x-y)(x+y)` `Q=x²+xy-xy-y^2` `Q=x²-y²` Thay `x=1,5;y=10` `1,5²-10²=2,25-100=-97,75` Trả lời
`Q = x( x – y )+ y ( x – y )`
`⇔Q=(x+y)(x-y)`
`⇔Q=(1,5+10)(1,5-10)`
`⇔Q=11,5.(-8,,5)`
`⇔Q=-97,75`
`#DyHungg`
`Q=x(x-y)+y(x-y)`
`Q=(x-y)(x+y)`
`Q=x²+xy-xy-y^2`
`Q=x²-y²`
Thay `x=1,5;y=10`
`1,5²-10²=2,25-100=-97,75`