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hdismuke149
Group Title
How do you solve an equation by completing the square?
 one year ago
 one year ago
hdismuke149 Group Title
How do you solve an equation by completing the square?
 one year ago
 one year ago

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swin2013 Group TitleBest ResponseYou've already chosen the best response.1
An example would be: (x – 4)2 = 5 x – 4 = ± sqrt(5) x = 4 ± sqrt(5) x = 4 – sqrt(5) and x = 4 + sqrt(5)
 one year ago

hdismuke149 Group TitleBest ResponseYou've already chosen the best response.0
I'm sorry, I still don't understand. Could you show me how to do it with an equation like x^2+6x=7
 one year ago

swin2013 Group TitleBest ResponseYou've already chosen the best response.1
Take half of the x term (6x) and square it. Make sure you are aware of the sign. So it'll be +9 since 6/2 = 3 and (3)^2 is 9.
 one year ago

swin2013 Group TitleBest ResponseYou've already chosen the best response.1
Then it should look like x^2 +6x +9 = 7+9
 one year ago

swin2013 Group TitleBest ResponseYou've already chosen the best response.1
Now it is the complete the square part. You take half of the x term again to make it look like (x+3x)^2 and add the other side. So the new equation will look like (x+3)^2 = 16. To find the solutions, you must get rid of the squared (x+3) on the left side by square rooting both sides. It will look like x+3 = + or  4. Now move the 3 over to the right side to find your solutions. it will be 3 +4 or 3 4 which is 1 and 7
 one year ago

hdismuke149 Group TitleBest ResponseYou've already chosen the best response.0
Thank You!!
 one year ago
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