x^2-2x + ...=5
half of -2,then square it.
x^2-2x+1=5+1
(x-1)^2=(sqrt6)^2
you finish.
Solve by completing the square x2 - 2x - 5 = 0. Help please
a)1 plus or minus√6
b)-1 plus or minus√6
c)-3 plus or minus 2√6
d)3 plus or minus 2√6
3 answers
i don't know how?(:<
(x-1)^2=sqrt6^2
Take the square root of both sides.
x-1=sqrt6..
you have to know how to finish from here
Take the square root of both sides.
x-1=sqrt6..
you have to know how to finish from here