Hello,
What is the exact question ?
The equation you got has no real solution ;-)
I think they want you to complete the equation to got a perfect square.
So use (a-b)²=a²-2ab+b², with a=x and 2ab=-12
Hello and thank you all for the help.
I am working on a problem and I am completely at a loss.
this is the problem I am working on.
(x-10)(x-2)=-20
now I think this is what I am supposed to do,
x^2-12x+20=-20
+20 +20
x^2-12x+40=0
this is were I am lost.
Sorry,
The chapter we are in is Quadratic formula, Factoring and completing the square. and the question is Solve the each equation by the method of your choice.
I can't however find an example of an equation of this type in the entire chapter. So I am pretty lost.
Ow !
If you try to make a square :
x²-12x + ??? = ??
With ??? a perfect square that will let you factorize x²-12x+??? to a square
So a=x
2ab=12x, with b²=???
So b=6.
So you must make appear 36 in the term.
Which will give :
x²-12x+20=20 <=> x²-12x+36=4 <=> (x-6)²=4=2²