x^2 - 4x + 12 = 0

I need the square to be completed... please.
in Algebra 2 Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

x^2 - 4x + 12 = 0

There's a -4 on the x in the middle.  Half of -4 is -2.  -2 squared is 4.

x^2 - 4x + 4 - 4 + 12 = 0

x^2 - 4x + 4 + 8 = 0

x^2 - 4x + 4 = -8

(x - 2)^2 = -8

You can't square something and get a negative result.

No solution.
by Level 13 User (103k points)

Related questions

1 answer
4x^2-x-3=0
asked Jun 6, 2012 in Algebra 1 Answers by anonymous | 951 views
1 answer
solve the ineqlity by completing square x^2 - x < 0
asked Jan 24, 2016 in Calculus Answers by Mehwish Khan | 673 views
2 answers
2n^2 - n - 6 = 0
asked May 23, 2014 in Algebra 1 Answers by anonymous | 870 views
1 answer
x2 + 10x + 35 + 0 (complete the square)
asked Apr 23, 2014 in Algebra 2 Answers by kathy Level 1 User (120 points) | 2.3k views
1 answer
x^2-16x-80=0
asked Jan 11, 2013 in Algebra 2 Answers by anonymous | 2.0k views
1 answer
x^2-x-7=0 Solve by completing the square
asked Mar 3, 2012 in Algebra 2 Answers by anonymous | 1.1k views
1 answer
-3x^(2)+4=0
asked Dec 6, 2011 in Algebra 1 Answers by anonymous | 880 views
1 answer
complete the square -5 = -7x + 2X^2
asked Jul 14, 2014 in Algebra 1 Answers by ysay | 648 views
2 answers
Complete the square: x^2+2x=4
asked Jun 13, 2013 in Algebra 2 Answers by anonymous | 2.1k views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular questions within the last 3000 days

  1. 50+50-25X0+2+2= (19)
  2. it takes 10 road workers 5 days to complete a road repair when working 2 hours a day.Working at the same pace,how many days will it take 2 people working 5 hours a day to finish it? (3)
  3. Solve 15 -1(12÷4+1)? (4)
  4. 8:4(5+2) (3)
  5. How can i represent 1/3; 3/3; 7/3; 10/3 and 15/3 on a number line? (1)

Most popular tags

87,516 questions
100,279 answers
2,420 comments
732,350 users