SOLUTION: Solve by completing the square. {{{ x^2 + 6x + 4 = 0 }}} I thought I was doing the problem right but when I completed the check it was not. This is what I did: {{{ x^2 + 6x + 4

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Solve by completing the square. {{{ x^2 + 6x + 4 = 0 }}} I thought I was doing the problem right but when I completed the check it was not. This is what I did: {{{ x^2 + 6x + 4       Log On


   

Question 44753: Solve by completing the square.
+x%5E2+%2B+6x+%2B+4+=+0+
I thought I was doing the problem right but when I completed the check it was not. This is what I did:
+x%5E2+%2B+6x+%2B+4+=+0+
+x%5E2+%2B+6x+%2B+4+-+4+=+0+-+4+
+x%5E2+%2B+6x+=+-4+
+x%5E2+%2B+6x+%2B+3%5E2+=+-4+%2B+3%5E2+
+%28x+%2B+3%29%5E2+=+-4+%2B+9+
+%28x+%2B+3%29%5E2+=+5+
+sqrt%28%28x+%2B+3%29%5E2%29+=+%2B-sqrt%285%29+
+x+%2B+3+-+3+=+-3+%2B-+5+
+x+=+-3+%2B+5+ or +x+=+-3+-+5+
+x+=+2+ or +x+=+-8+
Answer by Nate(3500) About Me  (Show Source):