SOLUTION: I think I am right but i want to make sure. Find the value of the polynomial 9x^2 – 5x – 5 when x = 4 I got 119 am I right?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I think I am right but i want to make sure. Find the value of the polynomial 9x^2 – 5x – 5 when x = 4 I got 119 am I right?      Log On


   

Question 126218: I think I am right but i want to make sure. Find the value of the polynomial
9x^2 – 5x – 5 when x = 4 I got 119 am I right?
Answer by JessicaGill(40) About Me  (Show Source):
You can put this solution on YOUR website!
Lets look at the formula and the steps to solve it. Remember to use the proper order of operations P E M D A S .
y=%289%2Ax%5E2-5%2Ax-5%29
When x is 4
1. substitute 4 into the equation for each of your x variables.
y=%289%2A4%5E2-5%2A4-5%29
2. Following the order of operations, take 4 to the 2nd power (Exponents)
y=%289%2A16-5%2A4-5%29
3. Following the order of operations, simplify any multiplication
y=%28144-20-5%29
4. Following the order of operations, do any addition or subtraction that
is necessary
y=%28124-5%29
y=%28119%29
So your answer is correct. The trick to getting the correct answer is to watch your order of operations, which you did. Great Job!