解方程 (见下)(1)x²+36=13x (2)x²+5x=36 (3)x²-(m²+5)x+2(m²+3)=0
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![解方程 (见下)(1)x²+36=13x (2)x²+5x=36 (3)x²-(m²+5)x+2(m²+3)=0](/uploads/image/z/15170244-60-4.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+%EF%BC%88%E8%A7%81%E4%B8%8B%EF%BC%89%EF%BC%881%EF%BC%89x%26%23178%3B%2B36%3D13x+%EF%BC%882%EF%BC%89x%26%23178%3B%2B5x%3D36+%EF%BC%883%EF%BC%89x%26%23178%3B-%EF%BC%88m%26%23178%3B%2B5%EF%BC%89x%2B2%EF%BC%88m%26%23178%3B%2B3%EF%BC%89%3D0)
解方程 (见下)(1)x²+36=13x (2)x²+5x=36 (3)x²-(m²+5)x+2(m²+3)=0
解方程 (见下)
(1)x²+36=13x (2)x²+5x=36 (3)x²-(m²+5)x+2(m²+3)=0
解方程 (见下)(1)x²+36=13x (2)x²+5x=36 (3)x²-(m²+5)x+2(m²+3)=0
十字相乘法,你知道吗?如果不知道,就用求根公式,已经有人帮你解了
(x-9)(x-4)=0,∴x1=9,x2=4
(x+9)(x-4)=0,∴x1=-9,x2=4
[x-(m^2+3)](x-2)=0,∴x1=m^2+3,x2=2