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300(1+x)=507 300(1+x)2=507 300(1+x)+300(1+x)2=507 300+300(1+x)+300(1+x)2=507
100X100 200X200 250X250 300X300
300/350x100/100=85.71% 200/450x100/100=44.44% 450/500x100/100=90% 200/500x100/100=40% 300/500x100/100=60%
(90~110)x10/L (200~400)x10/L (100~200)x10/L (100~300)x10/L (150~300)x10/L
300/350x100/100=85.71% 200/450x100/100=44.44% 450/500x100/100=90% 200/500x100/100=40% 300/500x100/100=60%
300(1+x)=363 300(1+x)2=363 300(1+2x)=363 363(1-x)2=300
150x=200(x+5) 150x=200(x﹣5) 150(x+5)=200x 150(x﹣5)=200x
300(1+x)=363 363(1﹣x)2=300 300(1+2x)=363 300(1+x)2=363
实际产量+超产量=原计划产量,300+20%×300=x 实际产量+超产量=原计划产量,300+20%·x=x 实际产量-超产量=原计划产量,300-20%×300=x 实际产量-超产量=原计划产量,300-20%·x=x
210X315 200X170 540X340 300X300
2×200x=50(60﹣x) 200x=2×50(60﹣x)
2×50x=200(60﹣x) 50x=2×200(60﹣x)
300(1+x)=363 300(1+x)2=363 300(1+2x)=363 363(1-x)2=300
300×7﹣x=20 300×0.7﹣x=20 300×0.7=x﹣20 300×7=x﹣20
150x =200(x+5); 150x =200(x-5); 150(x+5) =200x; 150(x-5)=200x;
N10G92X400.0Y300.OZ100.O N10G92X400.0Y300.OZ150.O N10G92X400.0Y300.OZ200.O N10G92X400.0Y300.OZ320.O
(50~100)x10/L (200~300)x10/L (100~300)x10/L (100~200)x10/L (150~300)x10/L
x2=-2,解方程,得x=± (x-2)2=4,解方程,得x-2=2,x=4 4(x-1)2=9,解方程,得4(x-1)=±3,x1=,x2= (2x+3)2=25,解方程,得2x+3=±5,x1=1,x2=-4
300(1+x)=363 300(1+x)2=363 300(1+2x)=363 363(1-x)2=300