If (x − 1) is a factor of x2+4x+a and (x − 2) is a factor of x2+4x+b, then find the value of a + b .-17

If (x − 1) is a factor of x2+4x+a and (x − 2) is a factor of x2+4

1.	If (x − 1) is a factor of x2+4x+a and (x − 2) is a factor of x2+4x+b, then find the value of a + b .-17
Answer» If (x − 1) is a factor of $x^{2} + 4 x + a$ and (x − 2) is a factor of $x^{2} + 4 x + b$ , then find the value of a + b . -17