SOLUTION: Evaluate the given function for the value specified. f(x)=xsquare - 7x+10 ; find (a) f (0), (b) f (5),and (c) f (-2). a) f(0=> b) f(5)=> c) f(-2)=> PLEASE HELP I AM S

Algebra ->  Graphs -> SOLUTION: Evaluate the given function for the value specified. f(x)=xsquare - 7x+10 ; find (a) f (0), (b) f (5),and (c) f (-2). a) f(0=> b) f(5)=> c) f(-2)=> PLEASE HELP I AM S      Log On


   

Question 123088: Evaluate the given function for the value specified. f(x)=xsquare - 7x+10 ; find (a) f (0), (b) f (5),and (c) f (-2).
a) f(0=>
b) f(5)=>
c) f(-2)=>
PLEASE HELP I AM SO CONFUSED
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
a)

Let's evaluate f(0)


f%28x%29=1x%5E2-7x%2B10 Start with the given function


f%280%29=1%280%29%5E2-7%280%29%2B10 Plug in x=0


f%280%29=1%2A0-7%2A0%2B10 Raise 0 to the 2nd power to get 0


f%280%29=0-7%2A0%2B10 Multiply 1 and 0 to get 0


f%280%29=0-0%2B10 Multiply 7 and 0 to get 0


f%280%29=0%2B10 Subtract 0 from 0 to get 0


f%280%29=10 Add 0 and 10 to get 10


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b)
Let's evaluate f(5)


f%28x%29=1x%5E2-7x%2B10 Start with the given function


f%285%29=1%285%29%5E2-7%285%29%2B10 Plug in x=5


f%285%29=1%2A25-7%2A5%2B10 Raise 5 to the 2nd power to get 25


f%285%29=25-7%2A5%2B10 Multiply 1 and 25 to get 25


f%285%29=25-35%2B10 Multiply 7 and 5 to get 35


f%285%29=-10%2B10 Subtract 35 from 25 to get -10


f%285%29=0 Add -10 and 10 to get 0


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c)

Let's evaluate f(-2)


f%28x%29=1x%5E2-7x%2B10 Start with the given function


f%28-2%29=1%28-2%29%5E2-7%28-2%29%2B10 Plug in x=-2


f%28-2%29=1%2A4-7%2A-2%2B10 Raise -2 to the 2nd power to get 4


f%28-2%29=4-7%2A-2%2B10 Multiply 1 and 4 to get 4


f%28-2%29=4--14%2B10 Multiply 7 and -2 to get -14


f%28-2%29=18%2B10 Subtract -14 from 4 to get 18


f%28-2%29=28 Add 18 and 10 to get 28