Question

If x = 3, what is the value of 4x2 - 9?

Answer 1

27

Explanation:

x = 3

4x² - 9 = 4(3)² - 9 = 4(9) - 9 = 36 - 9 = 27

Answer 2

Answer: The answer may be, (2x+3) (2x-3)

Rewrite 4x^ as (2x)^

As- (2x)^-9

Then Rewrite 9 as 3^

Use the formula, 9^ - b^=(a+b) (a-b) where a= 2x and b=3.

(2x+3) (2x-3)

Also, the sign ^, stands for the 2 sqaure root.

Explanation: