If the quadratic equations ax2+2cx+b=0 and ax2+2bx+c=0, (b≠c) have a common root, then the value of a+4b+4c is
If equation ax2+2cx+b=0 and ax2+2bx+c=0 have one root in common, then a + 4b + 4c equals
Suppose that the three quadratic equations ax2−2bx+c=0, bx2−2cx+a=0 and cx2−2ax+b=0 all have only positive roots. Then,