evaluate expression 6x - 3x 2 + y3 for x =5 and y=3
6(5)-3(5)^2+3^3=-18
To evaluate the expression 6x - 3x^2 + y^3 for x = 5 and y = 3, you'll substitute the given values into the expression and perform the necessary computations.
Let's start by substituting x = 5 and y = 3 into the expression:
6(5) - 3(5)^2 + (3)^3
Now let's simplify each part of the expression:
6(5) = 30
(5)^2 = 25
3(25) = 75
(3)^3 = 27
Now substitute the simplified values back into the expression:
30 - 75 + 27
Next, perform the arithmetic operations:
30 - 75 = -45
-45 + 27 = -18
Therefore, the value of the expression 6x - 3x^2 + y^3 when x = 5 and y = 3 is -18.