SOLUTION: Okay, I need to solve for this using quadratic equations, I have the problem and the answer, can't make the two connect. f(x)=7/x + 7/x+4, f(x) = 1 Result should be 5(+-)(sq.r

Question 1766: Okay, I need to solve for this using quadratic equations, I have the problem and the answer, can't make the two connect.
f(x)=7/x + 7/x+4, f(x) = 1 Result should be 5(+-)(sq.rt of) 53
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
assuming your equations are and , then ignore the f(x) bit and just put y instead...so y equals the first one and also the second one, so the two equations are equal to each other, ie...

do fractions on this, to give...

then simplify out and collect terms (being careful with negative signs) to give...

Solve this with the Quadratic formula to give

is also . then take the 4 out, becoming 2 and then cancel the fraction, which gives

cheers
Jon.

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