Question

complete the square: x^2-2x

Answer 1

Add and subtract \(\left(\dfrac{-2}{2}\right)^2\) to start with.

Answer 2

what?

Answer 3

what is the co-efficient of 'x' in your expression ?

Answer 4

2

Answer 5

its -2
now divide it by 2, what u get ?

Answer 6

-1

Answer 7

square it, what u get ?

Answer 8

1

Answer 9

now add and subtract one , what u get ?

Answer 10

0 and 2?

Answer 11

those are roots, but you wouldn't have completed the square then...
you get
x^2-2x +1 -1
right ?

Answer 12

notice that x^2-2x+1 is a perfect square