Tìm x biết
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Ví dụ 4 Tìm x biết
a) \(-\frac{5}{8} + x = \left(-\frac{2}{3}\right)^2\)
b) \(\frac{2}{3}x - \left(-\frac{1}{2}\right)^2 = \frac{3}{4}\)
c) \(x(x - 3) + 9 = x^2 + 5x\)
d) \(-5 - 2x = (-0, 4)^2\)
e) \(\left(\frac{x - 2}{15}\right)^3 = \frac{8}{125}\)
f) \(\left(x + \frac{4}{5}\right)^3 = -\frac{1}{8}\)
g) \(2: x - \frac{3}{5} = 16\)
h) \((4x + 1)^2 = \frac{25}{9}\)
Ví dụ 4 Tìm x biết
a) \(-\frac{5}{8} + x = \left(-\frac{2}{3}\right)^2\)
b) \(\frac{2}{3}x - \left(-\frac{1}{2}\right)^2 = \frac{3}{4}\)
c) \(x(x - 3) + 9 = x^2 + 5x\)
d) \(-5 - 2x = (-0, 4)^2\)
e) \(\left(\frac{x - 2}{15}\right)^3 = \frac{8}{125}\)
f) \(\left(x + \frac{4}{5}\right)^3 = -\frac{1}{8}\)
g) \(2: x - \frac{3}{5} = 16\)
h) \((4x + 1)^2 = \frac{25}{9}\)