SOLUTION: Express the equation in standard form. 64x^2 + 9y^2 - 384x - 36y + 468 = 0

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Express the equation in standard form. 64x^2 + 9y^2 - 384x - 36y + 468 = 0      Log On


   



Question 1204750: Express the equation in standard form.
64x^2 + 9y^2 - 384x - 36y + 468 = 0

Found 3 solutions by Alan3354, MathLover1, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
/Express the equation in standard form.
64x^2 + 9y^2 - 384x - 36y + 468 = 0
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Express the equation in standard form.
64x^2-384x + 9y^2-36y = -468
64(x^2-6x) + 9(y^2-4y) = -468
64(x^2-6x+9) + 9(y^2-4y+4) = -468 + 64*9 + 9*4 = 144 = 12^2
64(x-3)^2 + 9(y-2)^2 = 12^2
Or,
%28x-3%29%5E2%2F%289%2F4%29+%2B+%28y-2%29%5E2%2F16+=+1

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

64x%5E2+%2B+9y%5E2+-+384x+-+36y+%2B+468+=+0
%2864x%5E2++-+384x+%29%2B+%289y%5E2-+36y%29+%2B+468+=+0....complete squares
64%28x%5E2++-+6x+%29%2B+9%28y%5E2-+4y%29+%2B+468+=+0
64%28x%5E2++-+6x+%2B3%5E2%29-64%2A3%5E2%2B+9%28y%5E2-+4y%2B2%5E2%29-9%2A2%5E2+%2B+468+=+0
64%28x++-+3%29%5E2-576%2B+9%28y-2%29%5E2-36+%2B+468+=+0
64+%28x+-+3%29%5E2+%2B+9+%28y-2%29%5E2+-+144+=+0
64+%28x+-+3%29%5E2+%2B+9+%28y-2%29%5E2=+144 ...divide by 144
64+%28x+-+3%29%5E2%2F144+%2B+9+%28y-2%29%5E2%2F+144=+1
4+%28x+-+3%29%5E2%2F9+%2B++%28y+-+2%29%5E2%2F16+=+1






Answer by ikleyn(52788) About Me  (Show Source):