Given the radius of a circle is 7 cm, what is the circumference?
1 answer:
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Answer: The given expression simplified to
Step-by-step explanation:
Given : expression
We have to simplify the given expression
Consider the given expression
Divide the numbers
Apply exponent rule,
We have,
Cancel out common factor b,
We have
Thus, the given expression simplified to
Answer:
There are two rational roots for f(x)
Step-by-step explanation:
We are given a function
To find the number of rational roots for f(x).
Let us use remainder theorem that when
f(a) =0, (x-a) is a factor of f(x) or x=a is one solution.
Substitute 1 for x
f(1) = 1-2-5+6=0
Hence x=1 is one solution.
Let us try x=-1
f(-1) = 1-2-5+6 =0
So x =-1 is also a solution and x+1 is a factor
We can write f(x) by trial and error as
We find that factor gives two irrational solutions as
±√3.
Hence number of rational roots are 2.