+0

# x^2 - 9y^2 = 0 where x > 0 and y > 0

0
67
2
+154

x^2 - 9y^2 = 0 where x > 0 and y > 0

work out the ratio of x : y

YEEEEEET  Apr 26, 2018
#1
+2117
+2

I hope this helps you! This is just algebraic manipulation.

 $$x^2-9y^2=0$$ $$x^2=9y^2$$ $$\frac{x^2}{y^2}=9$$ $$\left(\frac{x}{y}\right)^2=9$$ $$\frac{x}{y}=\frac{3}{1}\\ x:y=3:1$$ Be careful! Do not take the negative root. "x" and "y" must both be positive. This is given information.
TheXSquaredFactor  Apr 26, 2018
#2
+154
+1

Ok! thanks for the detailed explanation

YEEEEEET  Apr 27, 2018

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