NateSteele92 NateSteele92

10-07-2016
Mathematics

contestada

on the graph of y = x^ 2 - x - 2 represents

1. The Vertex
2. The y-Intercept
3. The Solution
4. The Axis of Symmetry

on the graph of y x 2 x 2 represents 1 The Vertex 2 The yIntercept 3 The Solution 4 The Axis of Symmetry class=

Respuesta :

10-07-2016

Hello,

y=x²-x-2=x²-2*1/2*x+1/4-2-1/4=(x-1/2)²-9/4

1. Vertex=(1/2,-9/4)
2. if x=0 then y=0²-0-2=-2
3.The roots:
x²-x-2=0
==>(x-1/2)²-9/4=0
==>(x-1/2-3/2)(x-1/2+3/2)=0
==>(x-2)(x+1)=0
x=2 or x=-1

4. axe of symmetry: x=1/2

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