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Maths help!!!

Express X2-4root2x+5 as a(x+b)2+c
Can someone work this out please
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MR1999
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Original post by Me100
Express X2-4root2x+5 as a(x+b)2+c
Can someone work this out please


I assume the original expression is x2−42x+5? x^2-4\sqrt{2}x+5? Do you know about completing the square? If so, what have you tried so far?
we are not allowed to give full solutions.

in general if you have

y = x2 + bx + c

you start off by dividing b by 2:

y = ( x + b/2 )2 + *

now square (b/2)... and find how to get from that number to c by adding or subtracting a suitable amount *

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