SOLUTION: How do you find "x" and the vertex of a problem such as y=(x+5)(x+3)

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Question 29358: How do you find "x" and the vertex of a problem such as
y=(x+5)(x+3)
Answer by atif.muhammad(135) About Me  (Show Source):
You can put this solution on YOUR website!
y=(x+5)(x+3)
This question is already factorised,
Therfore, x= -5, -3 --> If you were to substitute any of these values into the equation, you would get y=0
To find vertex:
Expand brackets
y=x%5E2%2B8x%2B15
y=%28x%2B4%29%5E2+-+16+%2B15+
y=%28x%2B4%29%5E2+-+1
The vertex is (-4,-1)