Question

3. If x2 + 4 = 29, then x2 - 4 = ?
A. 5
B. 121
C.
21
D. 25
E. 33

Answer 1

Answer is c as x is 25/2

Answer 2

c

Explanation:

because x²+4=29 you can solve the equation for x²

x²+4=29

x²=25

substitute the value of x² into the expression x²-4 to calculate the value the expression is equal to

x²-4=25-4=21

c.21 is your answer

hope this works