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Calculate the solution set. x^2+y^2+8x=15 9x^2+25y^2=225 My work: I did elimination...multiplied 25 to the top equation and got..... 16x^2200x600...I then used quadratic formula ... And got 7.5 and 5..... Is 7.5 an
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If P(x,y),F1(3,0), F2(3,0) a nd 16x^2+25y^2=400, then find PF1+PF2.
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complete factorization y^425y^2+144 (^) denotes following number is Power y^4  25y^2 + 144 You might try replacing y^2 with x. Therefore your statement becomes: x^2  25x + 144 ...which is easier to factor.
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