What is the intersection points of f(x)=2x+7 and g(x)=x^2-1

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asked Mar 13, 2019 180k views

1 Answer

Argoron · Answer 1 · 2019-03-19T22:53:08+0000

intersecting means f(x)=g(x)
2x+7=x²-1
x²-2x-8=0
(x-4)(x+2)=0
x=4, or x=-2
when x=4, f(x)=g(x)=15
when x=-2, f(x)=g(x)=3
so the intersecting points are (4, 15) and (-2, 3)

What is the intersection points of f(x)=2x+7 and g(x)=x^2-1

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