Question

Simplify 2x^2 - y for x = 3 and y = -2.
a) 10
b) 14
c) 20
d) 16

Answer 1

When substituting x = 3 and y = -2 into the expression 2x^2 - y, the result is 2(3)^2 + 2, which simplifies to 20.

Step-by-step explanation:

To simplify the expression 2x^2 - y with the given values x = 3 and y = -2, we substitute these values into the expression.

Substitution step:

• 2(3)^2 - (-2)
• 2(9) + 2
• 18 + 2
• 20

The simplified value of the expression, when x is 3, and y is -2, is 20.