Find the solutions of the equation x² - 64 = 0 by extracting the square root.
A. 4 and – 4
B. 8 and – 8
C. 16 and – 16
D. 32 and -32
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Find the solutions of the equation x² - 64 = 0 by extracting the square root.
A. 4 and – 4
B. 8 and – 8
C. 16 and – 16
D. 32 and -32
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Answer:
Find the solutions of the equation x² - 64 = 0 by extracting the square root.
A. 4 and – 4
B. 8 and – 8
C. 16 and – 16
D. 32 and -32
Answer ; Letter B
Solution:
x² - 64 = 0
(x - 8)(x + 8) = 0
x - 8 = 0 | x + 8 = 0
x = 8 | x = -8
Therefore, x1 = 8 and x2 = -8