tristianthompson tristianthompson

22-11-2020
Mathematics

contestada

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

Respuesta :

22-11-2020

Answer is c as x is 25/2

Answer Link

elizabethsrt06 elizabethsrt06

22-11-2020

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

Answer Link

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