SOLUTION: Find the x-intercepts for the graph of the equation y = x^2 + 4x

SOLUTION: Find the x-intercepts for the graph of the equation y = x^2 + 4x - 45

Question 168264: Find the x-intercepts for the graph of the equation
y = x^2 + 4x - 45
Answer by jojo14344(1513) (Show Source): You can put this solution on YOUR website!
Given eqn,

Remember quadratic function --->
To have a clearer picture of the graph,
We first find the x-coordinate of the vertex with the formula:
---->
, x-coordinate of vertex
.
Then for the y-coordinate:

, y-coordinate of vertex
VERTEX -----> (-2,-49)
.
Now for the y-intercept: let x=0 --->
Solving or the x-intercept, via our eqn:
, factor out, perfect square

x-intercepts----
See graph below,
----> ALL INTERCEPTS are marked: GREEN circle=y-intercept and BLUE circle=x-intercepts with BLACK circle as VERTEX (-2,-49)
.
Thank you,
Jojo

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