# If the quadratic equation #ax^2 + 2cx + b = 0# and #ax^2 +2bx + c = 0, (b != c)#, have a common root then a + 4b + 4c is equal to?

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A) -2

B) -1

C) 0

D) 1

A) -2

B) -1

C) 0

D) 1

##### 1 Answer

Aug 19, 2017

Answer is

#### Explanation:

As

subtracting first from second we get

or

Further, as

Hence answer is