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elena-14-01-66 [18.8K]
3 years ago
8

I don't know how to solve these two types of questions: (x+y)(x-y)=20 and (z+z)(z+z)=63

Mathematics
1 answer:
Ksju [112]3 years ago
7 0

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ANSWER:

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What is the vertex of the quadratic function f(x) = (x – 8)(x – 2)?
LekaFEV [45]
Something funny is that the x value of the vertex lies directl in the middle of the x intercepts
so
we see the x intercepts or 0's at x=8 and 2
the average is x=5
so find f(5) to find the y value of the vertex
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vertex is at (5,-9)

the actual way the teacher wants is to expand then compltete the square to get into the form f(x)=a(x-h)^2+k where the vertex is (h,k)
but whatever


verrtex is at (5,-9)
7 0
4 years ago
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