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5 votes
Express x²+4x-2 in the form of (x+a)²+b​

User Nghauran
by
3.4k points

2 Answers

3 votes

Answer:

(x + 2)² - 6

Explanation:

Using the method of completing the square

add/subtract ( half the coefficient of the x- term)² to x² + 4x

x² + 2(2)x + 4 - 4 - 2

= (x + 2)² - 6

User David Elliman
by
3.6k points
3 votes

Answer:

(x+2)^2-6

Explanation:

(x+2)^2 = x^2 + 4x + 4

x^2 + 4x + 4 -6 = x²+4x-2

User Rutger
by
3.8k points