1.

X2 - (a + b)x + ab = 0 factorise​

Answer»

Answer:

x2 - (a + B) X + ab = 0

⇒ x2 - ax - BX + ab = 0

⇒ x (x -a) -b(x -a) = 0

⇒ (x -a) (x -b) = 0

since x -a = 0 or x -b = 0

then x = a or x = b


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