Question

Which of the following are quadratic equations?
1) 2x² - 5=0
ii) x²-1/x²=5
$\sqrt{12} \: 7$

iii) 12 * 7%-5-2=0​

Answer 1

Answer:

1. 2x^2-5

2x^2=5

$x = \frac{ + }{ - } \: \frac{5}{2}$

Answer 2

Step-by-step explanation:

5 upon 2 is the correct answer