The problem is f(x)=x^2+3bx-b^2+1
I'm suppose to get the value of 'b'
What I started off was with the vertex formula which was -b/2a
So this is what I think is a, b, and c
a = x^2
So I did -3bx/2(1) which is -3bx/2
Then I plugged the equation back in
But when I looked at the answer book, it gave me a completely different answer which was b = +- 2/square root of 13
(Plus or minus two divdided by the square root of 13)
Can anyone help me with the steps and see if my a, b, and c variables are correct?
And please do it the way that my teacher wants it and not the discriminant formula
Just by finding the variable, plugging it back into the equation, and simplifying it to get the value of 'b'
So what my teacher started off with was the vertex formula, but then after that, I got lost cause I did not know if my 'a, b, and c variables were right cause there is a d and an x.