SOLUTION: The quadratic function f(x) has one zero at x=-5 and a turning point at (3,10). What is the value of its other zero?

Question 973103: The quadratic function f(x) has one zero at x=-5 and a turning point at (3,10). What is the value of its other zero?
Found 2 solutions by reviewermath, stanbon:
Answer by reviewermath(1029) (Show Source): You can put this solution on YOUR website!
The quadratic function f(x) has one zero at x=-5 and a turning point at (3,10). What is the value of its other zero?
Solution:
The difference between the other zero from 3 should be the same as the difference between 3 and -5.
Let k be the other zero
k - 3 = 3 - (-5)
k - 3 = 8
k = 11
Therefore, the other zero is .

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The quadratic function f(x) has one zero at x=-5 and a turning point at (3,10). What is the value of its other zero?
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Plot the points (-5,0) and (3,10)
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Since x = 3 is on the axis of symmetry,
3 is half-way between the zeroes of the equation.
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Since -5 is 8 to the left of x = 3, the other
zero is 8 to the right of x = 3.
Ans: The other zero is at x = 11
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Cheers,
Stan H.
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