Question

6.x = 4y2-12 (4y2 here means 4 y squared)
Work out the value of x when y = 5

Answer 1

88

Explanation:

Given

x = 4y² - 12 ← substitute y = 5

x = 4(5)² - 12 = 4(25) - 12 = 100 - 12 = 88