用因式分解法计算!x²+7x-18=0 3x²+2x-5=0 4(x-2)²=9(2x+1)² (x+2)²-10(x+2)+25=0 3(x-2)+x²-2x=0 要详细过程哦急!
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/21 17:51:34
![用因式分解法计算!x²+7x-18=0 3x²+2x-5=0 4(x-2)²=9(2x+1)² (x+2)²-10(x+2)+25=0 3(x-2)+x²-2x=0 要详细过程哦急!](/uploads/image/z/240327-63-7.jpg?t=%E7%94%A8%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E6%B3%95%E8%AE%A1%E7%AE%97%21x%26%23178%3B%2B7x-18%3D0+++++++3x%26%23178%3B%2B2x-5%3D0+++++++4%28x-2%29%26%23178%3B%3D9%EF%BC%882x%2B1%EF%BC%89%26%23178%3B+%EF%BC%88x%2B2%EF%BC%89%26%23178%3B-10%EF%BC%88x%2B2%EF%BC%89%2B25%3D0++++++++3%EF%BC%88x-2%EF%BC%89%2Bx%26%23178%3B-2x%3D0++++++++%E8%A6%81%E8%AF%A6%E7%BB%86%E8%BF%87%E7%A8%8B%E5%93%A6%E6%80%A5%21)
用因式分解法计算!x²+7x-18=0 3x²+2x-5=0 4(x-2)²=9(2x+1)² (x+2)²-10(x+2)+25=0 3(x-2)+x²-2x=0 要详细过程哦急!
用因式分解法计算!
x²+7x-18=0 3x²+2x-5=0 4(x-2)²=9(2x+1)²
(x+2)²-10(x+2)+25=0 3(x-2)+x²-2x=0 要详细过程哦急!
用因式分解法计算!x²+7x-18=0 3x²+2x-5=0 4(x-2)²=9(2x+1)² (x+2)²-10(x+2)+25=0 3(x-2)+x²-2x=0 要详细过程哦急!
x²+7x-18=0
(x+9)(x-2)=0
x1=-9,x2=2
3x²+2x-5=0
(3x+5)(x-1)=0
x1=-3/5,x2=1
4(x-2)²=9(2x+1)²
4(x-2)²-9(2x+1)²=0
(2x-4-6x-3)(2x-4+6x+3)=0
(4x+7)(8x-1)=0
x1=-7/4,x2=1/8
(x+2)²-10(x+2)+25=0
(x+2-5)^2=0
(x-3)^2=0
x=3
3(x-2)+x²-2x=0
x²+x-6=0
(x+3)(x-2)=0
x1=-3,x2=2