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Let f(x) = x^2 - 2x a. Find and simplify f(5) b. Find the value of x such that f(x)=3

Let f(x) = x^2 - 2x a. Find and simplify f(5) b. Find the value of x such that f(x)=3
asked 122k views
4 votes
Let f(x) = x^2 - 2x

a. Find and simplify f(5)
b. Find the value of x such that f(x)=3

asked
User Galactikuh
by
8.3k points

1 Answer

1 vote
a) f(5)= 5^2 -2•5= 25-10=15
b) x^2 -2x-3=0
(x-3)(x+1)=0 so
x=3 and x=-1 are the solutions
answered
User Nicolaas
by
7.9k points
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