2m²+m=3怎么解
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2m²+m=3怎么解
2m²+m=3怎么解
2m²+m=3怎么解
2m^2 m-3=0
(2m 3)(m-1)=0
m=1或-3/2
2m²+m-3=0
(2m+3)(m-1)=0
m=-3/2或m=1
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移项,2m2+m-3=0
因式分解,十字相乘法(m+1)(2m-3)=0
m+1=0 或2m-3=0
所以m1=-1,m2=1.5
2m²+m=3
2m²+m+1/8=25/8
(√2m+1/2√2)²=25/8
√2m+1/2√2=±5/2√2
√2m=±5/2√2-1/2√2=-3/√2或√2得:m=-3/2或1