Suppose F(x) = K $x ^ { 2 }$ + 2x) Is a Probability Density Function for a Continuous

Short Answer

Suppose f(x) = k( $x ^ { 2 }$ + 2x) is a probability density function for a continuous random variable on the interval $0 \leq x \leq 3$ Find the value of k and find the corresponding cumulative distribution function.
Enter just an unlabeled polynomial in x in standard form.