3 years ago

Use the vertex

Mathematics

1 answer:

xxTIMURxx [149]3 years ago

4 0

Answer:

Step-by-step explanation:

Let the quadratic function be

y=a(x+4)²-1

∵(-7,8) lies on it.

8=a(-7+4)²-1

8+1=a(-3)²

9a=9

a=9/9=1

so quadratic function is

f(x)=1(x+4)²-1

f(x)=x²+8x+16-1

so quadratic function is

f(x)=x²+8x+15

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