algebra

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What number is used to complete the square for the equation y^2 + 16 = -y?

a) 64
b)-.25
c) .25
d) -64

a

• algebra -

y^2 + 16 = -y?
1y^2 +1 y = -16
(1/2)^2 = 1/4 = .25 {so c}
y^2 + y + .25 = -16+.25 = -15.75
(y+.5)^2 = -15.75

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