What is the the vertex of #y = (x-1)^2+2x-12#?
2 Answers
Aug 6, 2018
Explanation:
#"expand and rearrange into standard form"#
#•color(white)(x)y=ax^2+bx+c color(white)(x);a!=0#
#y=x^2-2x+1+2x-12#
#y=x^2-11#
#"A quadratic in the form "y=ax^2+c#
#"has it's vertex at "(0,c)#
#"this has it's vertex at "(0,-11)#
graph{x^2-11 [-40, 40, -20, 20]}
Aug 6, 2018
Expand the brackets
The parabola
Another method:
To find the x coordinate of the vertex use
From
(0,-11) is your vertex