解方程组 (1)2x-y=3 (2)x²+y²+2x-24=0
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解方程组 (1)2x-y=3 (2)x²+y²+2x-24=0
![解方程组 (1)2x-y=3 (2)x²+y²+2x-24=0](/uploads/image/z/6179110-70-0.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84+%281%292x-y%3D3+%282%29x%26%23178%3B%2By%26%23178%3B%2B2x-24%3D0)
{2x-y=3 (1)
{x²+y²+2x-24=0 (2)
由(1)得:
y=2x-3
代入(2)得:
x²+(2x-3)²+2x-24=0
x²-2x-3=0
解得:x=-1,x=3
y=-5,y=3
∴{x=-1,y=-5;{x=3,y=3
{x²+y²+2x-24=0 (2)
由(1)得:
y=2x-3
代入(2)得:
x²+(2x-3)²+2x-24=0
x²-2x-3=0
解得:x=-1,x=3
y=-5,y=3
∴{x=-1,y=-5;{x=3,y=3
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