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# Completing the square watch

1. If there’s a quadratic to complete the square and then there’s the same but doubled how do you find the value of x for the second one using the 1st example below
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2. May 2008
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3. (Original post by Reece.W.J)
May 2008
transformations
idk if x is double or half I forget
4. (Original post by angrypoliceman)
transformations
idk if x is double or half I forget
I’ve not heard of transformations obvious guess would be double but idk as well
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5. x is the same but y doubles:look at the second eqn as 2(x+3)^2 - 26 (once the square is completed)
6. Think it's is the vertex where you get A and b from completing the square then and as then the vertex is
7. (Original post by angrypoliceman)
transformations
idk if x is double or half I forget
Do you know what happens when signs are switched?
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8. (Original post by Reece.W.J)
Do you know what happens when signs are switched?
It depends if it is - the function or if it is -x
reflects the graph in the y axis
reflects the graph in the x axis.
9. (Original post by M4cc4n4)
It depends if it is - the function or if it is -x
X^2-5x+8 turns into -x^2+5x-8 how does this change the greatest value
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10. (Original post by Reece.W.J)
X^2-5x+8 turns into -x^2+5x-8 how does this change the greatest value
The X value of the minimum point becomes the x value of the maximum point.

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