Question

Evaluate the expression 3x2+4−y for x=2 and y=−1.

Answer 1

To evaluate the expression, plug in the value of each of these variables.

We're given the expression
`\sf{3x^2+4-y}`. We also know that x = 2 and y = -1. Our next step is to substitute the values of x and y, like this :

⇒
`\sf{3*2^2+4-(-1)}`

Then, we simplify.

⇒
`\sf{3*4+4+1}`

⇒
`\sf{12+4+1}`

⇒
`\sf{12+5}`

⇒
`\boxed{\sf{17}}`

Our result is 17.

Answer 2

17.

Explanation:

To evaluate the expression 3x^2 + 4 - y for x = 2 and y = -1, we can substitute the values of x and y into the expression and perform the necessary calculations.

First, let's substitute x = 2 and y = -1 into the expression:

3(2)^2 + 4 - (-1)

Next, let's simplify the expression using the order of operations:

3(4) + 4 + 1

12 + 4 + 1

Finally, let's add the numbers together:

12 + 4 + 1 = 17

Therefore, when x = 2 and y = -1, the value of the expression 3x^2 + 4 - y is 17.