Which of the following is a quadratic equation : x + 1 \x = x ^(2) x2 + 1/x2 = 5 x2 + 3rootx + 7 = 0 2x2 - 5x = (x-1)2 ​

Question

Which of the following is a quadratic equation :


`x + 1 \x = x ^(2)`
x2 + 1/x2 = 5

x2 + 3rootx + 7 = 0

2x2 - 5x = (x-1)2


​

Answer 1

a, b and c are not polynomial

and d I'd correct

2x² - 5x = x² -2x +1