96/(X+12)+40/60=96/X 怎么做...要過程~
96/(X+12)+40/60=96/X 怎么做...要過程~
快快~急~
快快~急~
數(shù)學(xué)人氣:429 ℃時(shí)間:2020-03-28 08:44:52
優(yōu)質(zhì)解答
96/(X+12)+40/60=96/X96/(X+12)+2/3=96/X3x*96+2x(x+12)=96*3(x+12)288x+2x²+24x=288x+34562x²+24x-3456=0x²+12x-1728=0(x-36)(x+48)=0x=36,x=-48
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