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#1 2006-02-21 06:53:25

rp_
Member
Registered: 2006-02-10
Posts: 7

solve the equation

if i have the ellipse x²/16 +y²/9 = 1

If x = 1.8 how do i fin y
could you please show your steps

thanks.

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#2 2006-02-21 09:05:10

irspow
Member
Registered: 2005-11-24
Posts: 455

Re: solve the equation

Solve for y first;

1 = x²/16 + y²/9;

9(1 - x²/16) = y²;

y = √(9(1 - x²/16);

y = (3/4)√(16 - x²);

if x = 1.8;

y = .75(±√12.76);

y ≈  ±2.68

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