it exceeds it by 20
Step-by-step explanation:
Given: when x = 2, y = 4
We will substitute for x and y in each of the expressions:
4x² - y = 4(2)² + 4
4x² - y = 16 + 4
4x² - y = 20
3x² - 3y = 3(2)² - 3(4)
3x² - 3y = 12 - 12
3x² - 3y = 0
To determine the amount 4x² - y exceeds 3x²- 3y, we will substract the value of 3x² - 3y from 4x² - y:
Value of 4x² - y - value of 3x² - 3y
= 20 - 0
= 20
Hence, the value of 4x² - y exceeds 3x² - 3y by 20