Question

The number of quadratic equations having real roots and which do not change by squaring their roots? (a)4 (b)3 (c)2 (d)1

Answer 1

ones with roots
(1,1), (1,-1), (-1,-1)
do we include (0,1) and (0,-1)?

Answer 2

oh - we cant include -1 because that changes to 1
so maybe the answer is (1,1) and (0,1)
what about x^2 = 0 with roots (0,0) ??
lol - im not sure!!

Answer 3

i guess the answer is 3

Answer 4

infinite

Answer 5

oh yes - of course!!