Factorises as (5x-2)(5x-2) so x = 0.4
25x2= 4, -20x = -8
4 - 8 + 4 = 0
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1 plus 1 plus 1 plus 1 equals 1 times 4. 1 times 4 equals 4. 4 minus 4 equals 0. 0
22 = 4
x = y = 0 ?
That would still be 4. If it were times 0 it would be 0.
-7