Use the formula y = 5x2 − 6x − 2 to determine the value of y when x = -2, 3 and 5.

Question

find the value of y please 

Answer 1

y = 5x² - 6x - 2

When x = -2, y = 5(-2)² -6(-2) - 2

y = 20 + 12 - 2

y = 30

 When x = 3, y = 5(3)² - 6(3) - 2

y = 45 - 18 - 2

y = 25

 

When x = 5, y = 5(5)² - 6(5) - 2

y = 125 - 30 - 2

y = 93