3x to the second power,minus 15x plus 18 is????
3x^2 - 15x + 18
do you need to factor this??? if so,
first since the numerical coefficients (the number before the variable x) are all multiples of 3, we can factor out 3:
3(x^2 - 5x +6)
then we factor the term inside the parenthesis:
3(x-2)(x-3)
hope this helps~ :)
zxz
To evaluate the expression 3x^2 - 15x + 18, we substitute specific values for x and simplify the expression. Let's walk through the steps:
Step 1: Start with the given expression: 3x^2 - 15x + 18.
Step 2: Substitute a value for x. For this example, let's use x = 2.
Step 3: Replace x with 2 in the expression:
3(2)^2 - 15(2) + 18.
Step 4: Simplify the expression within parentheses:
3(4) - 15(2) + 18.
Step 5: Calculate the exponent:
12 - 30 + 18.
Step 6: Perform multiplication and subtraction from left to right:
-18 + 18.
Step 7: Finally, perform the addition:
0.
Therefore, when x = 2, the expression 3x^2 - 15x + 18 equals 0.
It's important to note that you can evaluate this expression for different values of x by following the same steps.