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Complete the square y=x^2+6x+8
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2 votes
Complete the square y=x^2+6x+8

User KatyB
by
6.4k points

1 Answer

6 votes

Answer:

y = (x+3)² - 1

Explanation:

To complete the square take the middle term b and divide by 2. Then square the value.

Here b = 6.

So 6/2 = 3

3² = 9

Add 9 to both sides of the equation.

x² + 6x + 8 = 0

x² + 6x + 9 + 8 = 9

(x+3)² - 1 = y

User Kuba Wasilczyk
by
5.7k points
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