Question

найдите значение выражения $\frac{2-3x^{2} }{ x^{2} }$ при$x= \frac{1}{2}$

Answer 1

x^2 = 1/4;

3x^2 = 3/4;

2-3x^2 = 2 - 3/4 = 8/4 - 3/4 = 5/4;

(2-3x^2)/x^2 = (5/4) / (1/4) = 5.