SOLUTION: find the axis of symmetry y=x^2+7x+10 A)x=7 B)x=-7/2 C)x=7/2 D)x=-7: find the axis of symmetry

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: find the axis of symmetry y=x^2+7x+10 A)x=7 B)x=-7/2 C)x=7/2 D)x=-7: find the axis of symmetry       Log On


   

Question 90172: find the axis of symmetry
y=x^2+7x+10

A)x=7
B)x=-7/2
C)x=7/2
D)x=-7: find the axis of symmetry

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find the axis of symmetry
y=x^2+7x+10
Put the equation in symmetry form
y = x^2+7x+(7/2)^2 + 10 - (7/2)^2
y = (x+(7/2))^2 + 40/4 - 49/4
y = (x+(7/2))^2 - 7/4
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Axis of symmetry: x= -7/2
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graph%28400%2C300%2C-10%2C10%2C-10%2C10%2Cx%5E2%2B7x%2B10%29
Cheers,
Stan H.