Question

3a^2b-b^2-2ab+2b^2+5a^2b=7b

Answer 1

Answer:

Using the formula: x

2

−y

2

=(x+y)(x−y)

Substituing, x=5a−2b and y=2a−b in the above fomula we get:

(5a−2b)

2

−(2a−b)

2

=[(5a−2b)+(2a−b)][(5a−2b)−(2a−b)] =(7a−3b)(3a−b),

Hence the correct answer is (7a−3b)(3a−b)