How do you write the quadratic function in standard form #y=4(x-1)^2+5#?

2 Answers
Jun 25, 2017

#y=4x^2-8x+6#

Explanation:

#y=4(x-1)^2+5# This is Vertex form.

Expand & simplify
#y=4\cdot(x-1)(x-1)+5#
#y=4\cdot(x^2-2x+1)+5#
#y=4x^2-8x+4+5#
#y=4x^2-8x+9# This is Standard form.

Jun 25, 2017

#y=4x^2-8x+9#

Explanation:

#"the equation of a parabola in "color(blue)"standard form"# is.

#color(red)(bar(ul(|color(white)(2/2)color(black)(y=ax^2+bx+c ; a!=0)color(white)(2/2)|)))#

#"expand " (x-1)^2" using FOIL"#

#y=4(x^2-2x+1)+5#

#color(white)(y)=4x^2-8x+4+5#

#color(white)(y)=4x^2-8x+9larrcolor(red)" in standard form"#