Solve for K
K = \frac{25}{4} = 6\frac{1}{4} = 6.25
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\sqrt{9-4K+16}=0
Use the distributive property to multiply -4 by K-4.
\sqrt{25-4K}=0
Add 9 and 16 to get 25.
-4K+25=0
Square both sides of the equation.
-4K+25-25=-25
Subtract 25 from both sides of the equation.
-4K=-25
Subtracting 25 from itself leaves 0.
\frac{-4K}{-4}=-\frac{25}{-4}
Divide both sides by -4.
K=-\frac{25}{-4}
Dividing by -4 undoes the multiplication by -4.
K=\frac{25}{4}
Divide -25 by -4.
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