Question

For y = 3x - 2x2 +5x3, show how to find the value for y, when x = 3. Show your work

Answer 1

Y=3(3)-2x2+5x3

First multiply 3 and 3

y=9-2x2+5x3

Now multiply 2 and 2

y=9-4+5x3

now multiply 5 and 3

y=9-4+15

9-4+15=20

So Y=20