Question

a) 2x² - 1=0
b) 7x² + y=0
c) 4x - 1=0
d) 2x² - 3x + 5=0​

Answer 1

Răspuns:

$2 {x}^{2} - 1 = 0 \\ 2 {x}^{2} = 1 \\ {x}^{2} = \frac{1}{2} \\ x = + \frac{ \sqrt{2} }{2} \\ x = 1$