If x2 + 3x + c = (x + a)(x + b) for all x, what is the value of c ?
(1) a = 1
(2) b = 2
OA is D. Any ideas how?
(1) a = 1
(2) b = 2
OA is D. Any ideas how?
x ^ 2 + 3x + C = (x+a) (x+b) = x^2 + (a+b) x + ab
a=1 means b=2.
because the coefficient of x is nothing but sum of a and b, C is the product of a and b a+b =3 and C=ab
b=2 means a=1
