Example 1
What's the value of 5x2 – 3x – 4 when x = -1?
Example 2
What's the value of x4 – 16 when x = 2?
Example 3
What's the value of 3x3 + 4x2 – 5 when x = -3?
Example 4
Evaluate 3xy + 2xy2 – xy4 for x = 3 and y = -2.
Example 5
Evaluate 4x + 3y – xy + 2x2y for x = -1 and y = -1.