Solve using the square root property (x + 3)2 = 49?
回答 (3)
2008-12-04 3:08 pm
✔ 最佳答案
(x + 3)^2 = 49x + 3 = ±√49
x + 3 = ±7
x + 3 = 7
x = 7 - 3
x = 4
x + 3 = -7
x = -7 - 3
x = -10
∴ x = -10 , 4
2008-12-04 2:49 pm
(x + 3)² = 49
x + 3 = ±7
x = -3 ± 7
x = -10 and 4
x + 3 = ±7
x = -3 ± 7
x = -10 and 4
2008-12-04 3:55 pm
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