If (2x−1)2=ax2+bx+c, then a+b+c= _________.
Find the value of a + b, if ax2 + bx + c = (2x−1)2 is an identity.
If the equations x2+2x+3=0 and ax2+bx+c=0 , a , b , c ^I R , have a common root, then a: b: c is