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# Maths - Completing the square watch

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"Find the values of a and b such that x^2 +10x +18 = (x-a)^2 +b"
I worked out that it is (x+5)^2 -25+18. ---> (x+5)^2 - 7. However, the answer says "a=5, b=-7". Why is a=5 and not -5? It says in the question (x-a)^2, so it says -a, therefore it should be -5? Same goes for b, answer say -7 but in the question it says (x-a)^2 ***+b***. So it should be +7.??? Please help ty ty
2. There has been an awakening
There has been an awakening
.....?? What do you mean by that?
4. (Original post by Perfection Ace)
.....?? What do you mean by that?
Your answer is correct, so either the ms is wrong or you miswrote the question..?
5. Your answer is correct, I think there could be a typo in the question
6. Okay, thank you to both of you. =D

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Updated: April 23, 2016
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