Question 291488
f(x)=a(x-h)^2 + k Standard form of quadratic equation
=ax^2+bx+c
=x^2+10x
=x^2+10x+25-25 take (10/2)^2=25 to complete the square. Then you must subtract the same amount to balance the equation.
=(x+5)^2-25
h=-5, k=-25, a=1, c=0, b=10
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Ed