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

Answer:

c

Step-by-step 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