cbapdasilveira cbapdasilveira

22-04-2017
Mathematics

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The question is -x^2+18x-75.

I know that first you need to find the axis of symmetry but I am not sure how to use the formula -b/2a in this equation??

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greermatt123 greermatt123

22-04-2017

When you use -b/2a you plug in a and b. in this case it would be -18/-2 which coms out as 9. then you plug 9 into x. -9^2+18(9)-75 which comes out as -12. Your vertex is (9,-12) your Axis of semmetry would be 9.

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