Asked by joethle
                solve the equation by completing the square round to da nearest hundred if nessesary.
x^2 + 10x = 18
A -11.56, 1.56
B 11.56, 1.56
C -11.56, - 1.56 my answer
D 11.56, -1.56
solve the equation by completing the square
x^2 + 9x -14 = 0
A 10.35, 1.35 Meh answer
B 10.35, -1.35
C -10.35, -1.35
D -10.35, 1.35
            
            
        x^2 + 10x = 18
A -11.56, 1.56
B 11.56, 1.56
C -11.56, - 1.56 my answer
D 11.56, -1.56
solve the equation by completing the square
x^2 + 9x -14 = 0
A 10.35, 1.35 Meh answer
B 10.35, -1.35
C -10.35, -1.35
D -10.35, 1.35
Answers
                    Answered by
            Reiny
            
    follow these steps
1. If the x^2 term has a coefficient other than 1, divide each term by that coefficient.
(in both of your cases, we can skip that step)
2. take half of the coefficient of the x term
3.square that
4. Add this to both sides of the equation.
5. Your left side is now a perfect square, write it as such
6. Take the √ of both sides , make sure you have ± of the constant
7. isolate x and you are done
the first one:
1. x^2 + 10x = 18
2 ..... 1/2 of 10 is 5
3. 5^2 = 25
4. x^2 + 10x + 25 = 18 + 25
5. (x+5)^2 = 43
6. x+5 = ± √43
7. x = -5 ± √43
In a solution I would write:
x^2 + 10x = 18
x^2 + 10x + 25 = 18 + 25
(x+5)^2 = 43
x+5 = ±√43
x = -5 ± √43
you do the 2nd one in the same way, show me the steps
    
1. If the x^2 term has a coefficient other than 1, divide each term by that coefficient.
(in both of your cases, we can skip that step)
2. take half of the coefficient of the x term
3.square that
4. Add this to both sides of the equation.
5. Your left side is now a perfect square, write it as such
6. Take the √ of both sides , make sure you have ± of the constant
7. isolate x and you are done
the first one:
1. x^2 + 10x = 18
2 ..... 1/2 of 10 is 5
3. 5^2 = 25
4. x^2 + 10x + 25 = 18 + 25
5. (x+5)^2 = 43
6. x+5 = ± √43
7. x = -5 ± √43
In a solution I would write:
x^2 + 10x = 18
x^2 + 10x + 25 = 18 + 25
(x+5)^2 = 43
x+5 = ±√43
x = -5 ± √43
you do the 2nd one in the same way, show me the steps
                    Answered by
            Anonymous
            
    Reiny none of that is even close to any of the options for an answer 
    
                    Answered by
            Anonymous
            
    It is choice A. 
-11.56,1.56
    
-11.56,1.56
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