(10-x)^2+(4/3 x-40/3)^2=49 x=?
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(10-x)^2+(4/3x-40/3)^2=49x=?(10-x)^2+(4/3x-40/3)^2=49x=?(10-x)^2+(4/3x-40/3)^2=49x=?(10-x)^2+(4/3x-4
(10-x)^2+(4/3 x-40/3)^2=49 x=?
(10-x)^2+(4/3 x-40/3)^2=49
x=?
(10-x)^2+(4/3 x-40/3)^2=49 x=?
(10-x)^2+(4/3 x-40/3)^2=49
解,得:
(10-x)^2+(4x-40)^2/9=49
9(10-x)^2+(4x-40)^2=441
9(100-20x+x^2)+(16x-320x+1600)-441==0
900-180x+9x^2+16x-320x+1600-441==0
2059-484x+9x^2==0
(以后的不好解了@,@)
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