@ilfy214 @Isaiah.Feynman @amistre64 @Hero @mathstudent55 help pleaseee

Question

@ilfy214  @Isaiah.Feynman @amistre64 @Hero @mathstudent55  help pleaseee

anonymous · Answer

attachment

amistre64 · Answer

expand it out and complete a square

anonymous · Answer

how

amistre64 · Answer

well, those are pretty basic algebra processes:  FOIL to expand and squareing half of the x term to complete a square

amistre64 · Answer

or, define the zeros and split the difference

amistre64 · Answer

x=4, and x=-2 are the zeros of this:   1 is the middle so (x-1) has to pertain to the vertex

amistre64 · Answer

y = a(x-1)^2 + k

when x=1,  whats the product for k?

(1-4)(1+2) = -3(3) = -9

y = a(x-1)^2 - 9

anonymous · Answer

$$y=(x-4)(x+2)$$
$$y=x ^{2}-2x-8$$
$$y=(x ^{2}-2x+1)-8-1$$
$$y=(x-1)^{2}-9$$
There's how you complete the square

amistre64 · Answer

the a is spurious at this point since x*x = x^2 has gives us 1

anonymous · Answer

@BangkokGarrett whats the vertex?