(3+x)^2-25=07+23x-20x^2=03-x^2=-2x19x+10=10x+x^25x-18=2(x-50

sunxuyiqing2022-10-04 11:39:541条回答

(3+x)^2-25=0
7+23x-20x^2=0
3-x^2=-2x
19x+10=10x+x^2
5x-18=2(x-50)
3x-11-(x-3)^2=0

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不tt魔族共回答了16个问题 | 采纳率87.5%: (3+x)^2-25=0
(3+x+5)(3+x-5)=0
(x+8)(x-2)=0
x1=-8,x2=2
7+23x-20x^2=0
20x^2-23x-7=0
(5x-7)(4x+1)=0
x1=7/5,x2=-1/4
3-x^2=-2x
x^2-2x-3=0
(x-3)(x+1)=0
x1=3,x2=-1
19x+10=10x+x^2
x^2-9x-10=0
(x-10)(x+1)=0
x1=10,x2=-1
5x-18=2(x-50)
5x-18=2x-100
3x=-82
x=-82/3
3x-11-(x-3)^2=0
3x-11-x^2+6x-9=0
x^2-9x+20=0
(x-4)(x-5)=0
x1=4,x2=5; 1年前

(3+x)^2-25=07+23x-20x^2=03-x^2=-2x19x+10=10x+x^25x-18=2(x-50 (3+x)^2-25=0 7+23x-20x^2=0 3-x^2=-2x 19x+10=10x+x^2 5x-18=2(x-50) 3x-11-(x-3)^2=0 有些有两个答案的要标出来！好的+分！ lps8888881年前4: 北_皓然共回答了20个问题 | 采纳率95%

(3+x)^2-25=0
(3+x+5)(3+x-5)=0
(x+8)(x-2)=0
x1=-8,x2=2
7+23x-20x^2=0
20x^2-23x-7=0
(5x-7)(4x+1)=0
x1=7/5,x2=-1/4
3-x^2=-2x
x^2-2x-3=0
(x-3)(x+1)=0
x1=3,x2=-1
19x+10=10x+x^2
x^2-9x-10=0
(x-10)(x+1)=0
x1=10,x2=-1
5x-18=2(x-50)
5x-18=2x-100
3x=-82
x=-82/3
3x-11-(x-3)^2=0
3x-11-x^2+6x-9=0
x^2-9x+20=0
(x-4)(x-5)=0
x1=4,x2=5

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