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6 votes
Rewrite the function by completing the square.

f(x)=x^2-4x-26

1 Answer

8 votes

Answer:


(x-2)^2-30

Explanation:

use the form
ax^2+bx+c to find the values of a, b, and c.


a=1, b= -4, c = -26

consider the vertex form of a parabola


a(x+d)^2+e

substitute the values of a and b into the formula
d=(b)/(2a)


d=(4)/(2(1))

simplify the right side.

find the value of e using the formula
e=c-(b^2)/(4a)


e=30

User Johnashu
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