Question

x3+7x2-4x-4,when x=3​

Answer 1

Given

• x = 3

To find

• x³ + 7x² - 4x - 4

Solution

• x³ + 7x² - 4x - 4
• (3)³ + 7(3)² - 4(3) - 4
• 27 + 7(9) - 12 - 4
• 27 + 63 - 12 - 4
• 90 - 16
• 74

∴ The value of x³ + 7x² - 4x - 4 where x is 3 is 74