3. Which value(s) of x are solutions to the equation: (x + 5)^2 = 49 a. only 2 b. only -12 c. 2 and -12 d. 44 and -54​

Question

3. Which value(s) of x are solutions to the equation: (x + 5)^2 = 49
a. only 2
b. only -12
c. 2 and -12
d. 44 and -54​

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Adela 1 year 2021-08-22T00:50:35+00:00 1 Answers 7 views 0

Answers ( )

    0
    2021-08-22T00:52:11+00:00

    Answer:

    c

    Step-by-step explanation:

    (x+5)² = 49

    x+5 = ±√49 = ±7

    x = ±7-5 = 2,-12

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )