用十字相乘法解方程-X^2-3X+10=0 6X^2+X-1=0-X^2-3X+10=0 6X^2+X-1=0 4X^2+24X+27=0 3X^2-7X-6=O4X^2-4X-15=0 20-9X-20X^2=0 (X+3)^2+5(X+3)-6=0
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![用十字相乘法解方程-X^2-3X+10=0 6X^2+X-1=0-X^2-3X+10=0 6X^2+X-1=0 4X^2+24X+27=0 3X^2-7X-6=O4X^2-4X-15=0 20-9X-20X^2=0 (X+3)^2+5(X+3)-6=0](/uploads/image/z/3940821-45-1.jpg?t=%E7%94%A8%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B-X%5E2-3X%2B10%3D0+6X%5E2%2BX-1%3D0-X%5E2-3X%2B10%3D0+6X%5E2%2BX-1%3D0+4X%5E2%2B24X%2B27%3D0+3X%5E2-7X-6%3DO4X%5E2-4X-15%3D0+20-9X-20X%5E2%3D0+%EF%BC%88X%2B3%EF%BC%89%5E2%2B5%28X%2B3%29-6%3D0)
用十字相乘法解方程-X^2-3X+10=0 6X^2+X-1=0-X^2-3X+10=0 6X^2+X-1=0 4X^2+24X+27=0 3X^2-7X-6=O4X^2-4X-15=0 20-9X-20X^2=0 (X+3)^2+5(X+3)-6=0
用十字相乘法解方程-X^2-3X+10=0 6X^2+X-1=0
-X^2-3X+10=0 6X^2+X-1=0 4X^2+24X+27=0 3X^2-7X-6=O4X^2-4X-15=0 20-9X-20X^2=0 (X+3)^2+5(X+3)-6=0
用十字相乘法解方程-X^2-3X+10=0 6X^2+X-1=0-X^2-3X+10=0 6X^2+X-1=0 4X^2+24X+27=0 3X^2-7X-6=O4X^2-4X-15=0 20-9X-20X^2=0 (X+3)^2+5(X+3)-6=0
-x2-3x+10=0 (x+2)(x-5)=0 x=-2或5 6x2+x-1=0 x=3分之一或副二分之一
-X^2-3X+10=0 6X^2+X-1=0 ==> (3x - 1)(2x +1) = 0 ==> x = 1/3, -1/2 4X^2+24X+27=0 ==> (2x + 3)(2x +9) = 0 ==> x = - 3/2, -9/2 3X^2-7X-6=O ==> (3x + 2)(x - 3) = 0 ==> x = -2/3, 3 4X^2-4X-15=0 ==> ...
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-X^2-3X+10=0 6X^2+X-1=0 ==> (3x - 1)(2x +1) = 0 ==> x = 1/3, -1/2 4X^2+24X+27=0 ==> (2x + 3)(2x +9) = 0 ==> x = - 3/2, -9/2 3X^2-7X-6=O ==> (3x + 2)(x - 3) = 0 ==> x = -2/3, 3 4X^2-4X-15=0 ==> (2x - 5)(2x + 3) = 0 ==> x = 5/2, - 3/2 20-9X-20X^2=0 ==> 20x^2 + 9x - 20 = 0 ==> (4x + 5)(5x - 4) = 0 ==> x = - 5/4, 4/5 (X+3)^2+5(X+3)-6=0 ==> (x+3 + 6)(x+3 -1) = 0 ==> (x+9)(x+2) = 0 ==> x = -9, -2
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