x*x=75%x*(x+3)怎么解?

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x*x=75%x*(x+3)怎么解?x*x=75%x*(x+3)怎么解?x*x=75%x*(x+3)怎么解?解x^2=0.75x^2+2.25x移项,合并同类项,得0.25x^2-2.25x=0提公因

x*x=75%x*(x+3)怎么解?
x*x=75%x*(x+3)怎么解?

x*x=75%x*(x+3)怎么解?

x^2=0.75x^2+2.25x
移项,合并同类项,得
0.25x^2-2.25x=0
提公因式(0.25x)得
0.25x(x-9)=0
所以0.25x=0或x-9=0
解得x=0或x=9.

原式x*x=75%x*x+225%x 25%x*x=225% x=+_3

x^2=0.75x^2+2.25x x^2-9x=0 x=0或x=9