x-intercepts

[lfalgoust02]

Write the equation for a function if the x-intercepts are -3 and 7



*cannot figure this one out!!!

 

[arthur ohlsten]

y=[x+3][x-7] answer

y=x^2-4x-21 complete the square
y=[ x^2-4x+4 ] -4-21
y=[x-2]^2-25 a parabola open up vertex at 2,-2
Arthur5

 

[arthur ohlsten]

vertex at 2,-25
Arthur