Question

решите уравнение 9x^2-16=0

Answer 1

$9x^{2} -16=0\\9x^{2} =16\\x^{2} =\frac{16}{9} \\x_{1} =-\frac{4}{3} \\x_{2} =\frac{4}{3}$

Answer 2

$9x^{2} - 16 = 0\\9x^{2} = 16\\x^{2} = \frac{16}{9} \\x1 = \sqrt{\frac{16}{9} } \\x2 = - \sqrt{\frac{16}{9} } \\\\x1 = \frac{4}{3} \\x2 = - \frac{4}{3}$