Tìm x, biết
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Bài 7. Tìm x, biết:
a) \( 2 - \sqrt{x} = -7 \) \( (x \ge 0) \)
b) \( 25 - \sqrt{x} - 5 = 9 \) \( (x \ge 5) \)
c) \( \frac{2}{9} - \sqrt{(x+1)^2} = -\frac{23}{9} \)
d) \( 3\sqrt{x+1} - \frac{1}{4} = 5 \) \( (x \ge -1) \)
e) \( \frac{1}{5} + \sqrt{3x+2} = 1 \) \( \left( x \ge -\frac{2}{3} \right) \)
f) \( \left( \sqrt{2x+1 - 4} \right)(5 + \sqrt{x}) = 0 \) \( (x \ge 0) \)
Bài 7. Tìm x, biết:
a) \( 2 - \sqrt{x} = -7 \) \( (x \ge 0) \)
b) \( 25 - \sqrt{x} - 5 = 9 \) \( (x \ge 5) \)
c) \( \frac{2}{9} - \sqrt{(x+1)^2} = -\frac{23}{9} \)
d) \( 3\sqrt{x+1} - \frac{1}{4} = 5 \) \( (x \ge -1) \)
e) \( \frac{1}{5} + \sqrt{3x+2} = 1 \) \( \left( x \ge -\frac{2}{3} \right) \)
f) \( \left( \sqrt{2x+1 - 4} \right)(5 + \sqrt{x}) = 0 \) \( (x \ge 0) \)