我想問下x(x+2+3)=x(x+3)+60
d步驟要點寫= =?
要全部步驟=.=
thx
數學方程唔識寫步驟= =
2007-09-09 9:58 pm
回答 (5)
2007-09-09 10:02 pm
✔ 最佳答案
x(x+2+3) = x(x+3)+60x(x+5) = x^2 + 3x + 60
x^2 + 5x = x^2 + 3x + 60
x^2 + 5x - x^2 - 3x = 60
2x = 60
x = 30
2007-09-10 12:35 am
x(x+2+3)=x(x+3)+60
x^2+2x+3x=x^2+3x+60
x^2+5x=x^2+3x+60
5x=x^2+3x+60-x^2
5x=3x+60
5x-3x=60
2x=30
x=15
x^2+2x+3x=x^2+3x+60
x^2+5x=x^2+3x+60
5x=x^2+3x+60-x^2
5x=3x+60
5x-3x=60
2x=30
x=15
2007-09-09 10:40 pm
x(x+2+3)=x(x+3)+60
x2次+2x+3x=x2次+3x+60
x2次+5x=x2次+3x+60
x2次-x2次+5x-3x=60
2x=60
x=30
x2次+2x+3x=x2次+3x+60
x2次+5x=x2次+3x+60
x2次-x2次+5x-3x=60
2x=60
x=30
2007-09-09 10:09 pm
x(x+2+3)=x(x+3)+60
(x ge2次)+2x+3x=(x ge2次)+3x+60
(x ge2次)+5x=(x ge2次)+3x+60
(x ge2次)-(x ge2次)+5x=(x ge2次)+3x+60-(x ge2次)
5x=3x+60
5x-3x=3x+60-3x
2x=60
2x/2=60/2
x=30
滿唔滿意??
(x ge2次)+2x+3x=(x ge2次)+3x+60
(x ge2次)+5x=(x ge2次)+3x+60
(x ge2次)-(x ge2次)+5x=(x ge2次)+3x+60-(x ge2次)
5x=3x+60
5x-3x=3x+60-3x
2x=60
2x/2=60/2
x=30
滿唔滿意??
參考: 我自己
收錄日期: 2021-04-13 13:24:25
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