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

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

asked
User Sandeep Pulikonda
by
7.8k points

2 Answers

5 votes
Answer is c as x is 25/2
answered
User ThijsW
by
8.4k points
7 votes

Answer:

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

answered
User Liftoff
by
8.1k points
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