kenneyfamily

what number would complete the square?
x^2-2x+6=0

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kenneyfamily

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a)1
b)6
c)4
d)-1

03453660

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1

kenneyfamily

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you sure?

kenneyfamily

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@03453660

03453660

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yap

03453660

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want to know??

kenneyfamily

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sure

kenneyfamily

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@03453660

03453660

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ok

03453660

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your equation is
x^2-2x+6=0
now take the constant to RHS
x^2-2x = -6
look to LHS of this equation what should i add to make it perfect square like it become (a+b)^2 or (a-b)^2

kenneyfamily

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ok

03453660

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so if i add 1 to LHS and RHS then LHS become a perfect square
x^2-2x+1 = -6+1
(x-1)^2 = -5
this LHS has became a perfect square by adding 1 to it

kenneyfamily

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got it!! thanks!!

03453660

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welcome! and sorry for the late reply i have some problem in internet connection

kenneyfamily

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no worries..could you help me with one more please? x^2-4x-9=0 @03453660

kenneyfamily

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a)9
b)-4
c)4
d)13

03453660

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this is 4

03453660

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did you know how to solve this. its a little bit tricky

kenneyfamily

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ok i can try and figure it out! thank you :)

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you are wlcome