Asked by alligator
which equation represents the axis of symmetry of the function y= -2x^2 + 4x -6
y=1
x=1
x=3
x=-3
y=1
x=1
x=3
x=-3
Answers
Answered by
Anonymous
It is an upside down parabola (sheds water) because of the -x^2 term so symmetric about x = something
well we could complete the square or we could find the roots
Lets find the roots and the look halfway between them
2 x^2 - 4x + 6 = 0
x^2 - 2 x + 3 = 0
x = [ 2 +/- sqrt (something) ] / 2
so at 1 +/- somthing
so middle at 1
x = 1
well we could complete the square or we could find the roots
Lets find the roots and the look halfway between them
2 x^2 - 4x + 6 = 0
x^2 - 2 x + 3 = 0
x = [ 2 +/- sqrt (something) ] / 2
so at 1 +/- somthing
so middle at 1
x = 1