jayda1208
Answered

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please help fasttt!!

Please Help Fasttt class=

Sagot :

taydenrobinson44

Answer:

then u help me

Step-by-step explanation:

Answer:

a. x= -4 x=2

b. (-1,-9)

c. [-9,∞)

d. x=-1

Step-by-step explanation:

To find the roots or x intercepts, you set the parabola equal to 0 and solve.

0=[tex]x^{2}[/tex]+2x-8 which will equal (x+4)(x-2) so x= -4, 2

To find the vertex you will do [tex]\frac{-b}{2a}[/tex], a=1 and b=2 so

[tex]\frac{-2}{2(1)}[/tex] which equals x= -1, to find the y value, you will plug x into the equation

y=[tex](-1)^{2}[/tex]+2(-1)-8 which means y=-9 so the vertex is (-1,-9)

The range is bottom to top so it is [-9,∞)

the AOS is equal to the x value of the vertex so x= -1

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