PsychoFish
New member
so -20 = -20
or
25-45 = 16-36
or
5[SUP]2[/SUP]-5*9=4[SUP]2[/SUP]-4*9
Let's add 81/4
5[SUP]2[/SUP]-5*9+81/4=4[SUP]2[/SUP]-4*9+81/4
so it's a perfect square
(5-9/2)[SUP]2[/SUP]=(4-9/2)[SUP]2[/SUP]
take the square root of both
5-9/2=4-9/2
thus (by adding 9/2)
5=4
or
25-45 = 16-36
or
5[SUP]2[/SUP]-5*9=4[SUP]2[/SUP]-4*9
Let's add 81/4
5[SUP]2[/SUP]-5*9+81/4=4[SUP]2[/SUP]-4*9+81/4
so it's a perfect square
(5-9/2)[SUP]2[/SUP]=(4-9/2)[SUP]2[/SUP]
take the square root of both
5-9/2=4-9/2
thus (by adding 9/2)
5=4