用求根公式解下列方程:(1)x²-4x=2 (2)3x²+x+1=0(3)2x²-3x-1=0 (4)8y-1=4y²解下列方程:(1)(3y-1)²-3=0 (2)x-3=4(x-3)²(3)x(x+3)=-2 (4)(x+3)²=2x+5 (5)x-5=(x-5)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 14:03:40
![用求根公式解下列方程:(1)x²-4x=2 (2)3x²+x+1=0(3)2x²-3x-1=0 (4)8y-1=4y²解下列方程:(1)(3y-1)²-3=0 (2)x-3=4(x-3)²(3)x(x+3)=-2 (4)(x+3)²=2x+5 (5)x-5=(x-5)²](/uploads/image/z/226823-23-3.jpg?t=%E7%94%A8%E6%B1%82%E6%A0%B9%E5%85%AC%E5%BC%8F%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%EF%BC%9A%EF%BC%881%EF%BC%89x%26%23178%3B-4x%3D2+%EF%BC%882%EF%BC%893x%26%23178%3B%2Bx%2B1%3D0%EF%BC%883%EF%BC%892x%26%23178%3B-3x-1%3D0+%EF%BC%884%EF%BC%898y-1%3D4y%26%23178%3B%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%EF%BC%9A%EF%BC%881%EF%BC%89%EF%BC%883y-1%29%26%23178%3B-3%3D0+%EF%BC%882%EF%BC%89x-3%3D4%28x-3%29%26%23178%3B%EF%BC%883%EF%BC%89x%28x%2B3%29%3D-2+%EF%BC%884%EF%BC%89%EF%BC%88x%2B3%29%26%23178%3B%3D2x%2B5+%EF%BC%885%EF%BC%89x-5%3D%28x-5%EF%BC%89%26%23178)
用求根公式解下列方程:(1)x²-4x=2 (2)3x²+x+1=0(3)2x²-3x-1=0 (4)8y-1=4y²解下列方程:(1)(3y-1)²-3=0 (2)x-3=4(x-3)²(3)x(x+3)=-2 (4)(x+3)²=2x+5 (5)x-5=(x-5)²
用求根公式解下列方程:(1)x²-4x=2 (2)3x²+x+1=0
(3)2x²-3x-1=0 (4)8y-1=4y²
解下列方程:(1)(3y-1)²-3=0 (2)x-3=4(x-3)²
(3)x(x+3)=-2 (4)(x+3)²=2x+5 (5)x-5=(x-5)² (6)3(x-2)²+5=35
用求根公式解下列方程:(1)x²-4x=2 (2)3x²+x+1=0(3)2x²-3x-1=0 (4)8y-1=4y²解下列方程:(1)(3y-1)²-3=0 (2)x-3=4(x-3)²(3)x(x+3)=-2 (4)(x+3)²=2x+5 (5)x-5=(x-5)²
(1)x²-4x=2
x²-4x+4=6
(x-2)²=6
x-2=±√6
x1=2+√6 x2=2-√6
(2)3x²+x+1=0
Δ=1²-4*3=-11