A Always pink positive [: Guest Jul 14, 2009 #1 2a^2 + 3a - 5a^2 = 9 then , a - a^2 = ? please help me ; its so harddd ! p.s. ^(then number) means exponent .
2a^2 + 3a - 5a^2 = 9 then , a - a^2 = ? please help me ; its so harddd ! p.s. ^(then number) means exponent .
