解方程 (1)3x∧2-9=0 (2)3x∧2-7x+4=0 (3)(x+3)(x+1)=6x+4
(4) (2x-1)∧2=x∧2+4x+4
人气:298 ℃ 时间:2020-01-28 15:47:56
解答
(1)3x²-9=03x²=9x²=3x=±√3(2)3x²-7x+4=0(3x-4)(x-1)=0x1=4/3,x2=1(3)(x+3)(x+1)=6x+4x²+4x+3-6x-4=0x²-2x-1=0x=(2±2√2)/2=1±√2(4)(2x-1)²=x²+4x...
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