Simplify 3x (4x – 5) + 3 and find its value for x = 3

Simplified: 12(x^2)-15x+3if x = 3: 66

Step-by-step explanation:

When you simplify expressions, you have to take out the parentheses, so we just multiply 3x by everything inside the parentheses. So 3x(4x-5) we get 12(x^2) - 15x and then we just add the 3 so we get 12(x^2)-15x+3. Now all we have to do is substitute x as 3, we get 66 as your answer. Sorry if I'm wrong, this is what I got.

63

Step-by-step explanation: Substitute the value of the variable into the equation and simplify.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.