解下列方程:(1)x²-15x=100 (2)(2x²-1)²-1=0 (3)(x-1)²-18=0(4)3(x-5)²=2(5-x)用因式分解法解下列一元二次方程(1)9t²-(t-1)²=0
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/24 22:00:41
解下列方程:(1)x²-15x=100(2)(2x²-1)²-1=0(3)(x-1)²-18=0(4)3(x-5)²=2(5-x)用因式分解法解下列一
解下列方程:(1)x²-15x=100 (2)(2x²-1)²-1=0 (3)(x-1)²-18=0(4)3(x-5)²=2(5-x)用因式分解法解下列一元二次方程(1)9t²-(t-1)²=0
解下列方程:(1)x²-15x=100 (2)(2x²-1)²-1=0 (3)(x-1)²-18=0
(4)3(x-5)²=2(5-x)
用因式分解法解下列一元二次方程
(1)9t²-(t-1)²=0
解下列方程:(1)x²-15x=100 (2)(2x²-1)²-1=0 (3)(x-1)²-18=0(4)3(x-5)²=2(5-x)用因式分解法解下列一元二次方程(1)9t²-(t-1)²=0
(1)x²-15x=100
x²-15x-100 =0
(x-20)(x+5)=0
x1=20 x2=-5
(2)(2x²-1)²-1=0
(2x²-1)²=1
2x²-1=±1
2x²=0或2x²=2
x²=0或x²=1
x1=0 x2=1 x3=-1
(3)(x-1)²-18=0
(x-1)²=18
x-1=±3√2
x1=1+3√2 x2=1-3√2
(4)3(x-5)²=2(5-x)
3(x-5)²+2(x-5)=0
(x-5)(3x-15+2)=0
(x-5)(3x-13)=0
x1=5 x2=13/3
用因式分解法解下列一元二次方程
(1)9t²-(t-1)²=0
(3t)²-(t-1)²=0
(3t+t-1)(3t-t+1)=0
(4t-1)(2t+1)=0
t1=1/4 t2=-1/2