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1)x^2-9x+8=0x1=8x2=1(2)x^2+6x-27=0x1=3x2=-9(3)x^2-2x-80=0x1=-8x2=10(4)x^2+10x-200=0x1=-20x2=10(5)x^2-20x+96=0x1=12x2=8(6)x^2+23x+76=0x1=-19x2=-4(7)x^2-25x+154=0x1=14x2=11(8)x^2-12x-108=0x1=-6x2=18(9)x^2+4x-252=0x1=14x2=-18(
题目详情
1)x^2-9x+8=0 x1=8 x2=1
(2)x^2+6x-27=0 x1=3 x2=-9
(3)x^2-2x-80=0 x1=-8 x2=10
(4)x^2+10x-200=0 x1=-20 x2=10
(5)x^2-20x+96=0 x1=12 x2=8
(6)x^2+23x+76=0 x1=-19 x2=-4
(7)x^2-25x+154=0 x1=14 x2=11
(8)x^2-12x-108=0 x1=-6 x2=18
(9)x^2+4x-252=0 x1=14 x2=-18
(10)x^2-11x-102=0 x1=17 x2=-6
(11)x^2+15x-54=0 x1=-18 x2=3
(12)x^2+11x+18=0 x1=-2 x2=-9
(13)x^2-9x+20=0 x1=4 x2=5
(14)x^2+19x+90=0 x1=-10 x2=-9
(15)x^2-25x+156=0 x1=13 x2=12
(2)x^2+6x-27=0 x1=3 x2=-9
(3)x^2-2x-80=0 x1=-8 x2=10
(4)x^2+10x-200=0 x1=-20 x2=10
(5)x^2-20x+96=0 x1=12 x2=8
(6)x^2+23x+76=0 x1=-19 x2=-4
(7)x^2-25x+154=0 x1=14 x2=11
(8)x^2-12x-108=0 x1=-6 x2=18
(9)x^2+4x-252=0 x1=14 x2=-18
(10)x^2-11x-102=0 x1=17 x2=-6
(11)x^2+15x-54=0 x1=-18 x2=3
(12)x^2+11x+18=0 x1=-2 x2=-9
(13)x^2-9x+20=0 x1=4 x2=5
(14)x^2+19x+90=0 x1=-10 x2=-9
(15)x^2-25x+156=0 x1=13 x2=12
▼优质解答
答案和解析
(x-1)(x-8)=0,x1=8 x2=1
(x-3)(x+9)=0,x1=3 x2=-9
(x-10)(x+8)=0,x1=10 x2=-8
(x-10)(x+20)=0,x1=10 x2=-20
(x+12)(x+8)=0,x1=12 x2=8
...
相信楼主应该也看出来了吧后面的全部照答案拆解...完成...
(x-3)(x+9)=0,x1=3 x2=-9
(x-10)(x+8)=0,x1=10 x2=-8
(x-10)(x+20)=0,x1=10 x2=-20
(x+12)(x+8)=0,x1=12 x2=8
...
相信楼主应该也看出来了吧后面的全部照答案拆解...完成...
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