Advertisements
Advertisements
Question
(a – b) ______ = a2 – 2ab + b2
Advertisements
Solution
(a – b) (a – b) = a2 – 2ab + b2
Explanation:
We know that,
(a – b) (a – b) = (a – b)2
= a2 – 2ab + b2 ...[∵ (a – b)2 = a2 – 2ab + b2]
APPEARS IN
RELATED QUESTIONS
(a – 1)2 = a2 – 1
Expand the following square, using suitable identities
(b – 7)2
Square of 3x – 4y is ______.
(a – b)2 = a2 – b2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
4a2 – 4ab + b2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
a2y3 – 2aby2 + b2y
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
`9y^2 - 4xy + (4x^2)/9`
Factorise the following.
x2 – 10x + 21
The curved surface area of a cylinder is 2π(y2 – 7y + 12) and its radius is (y – 3). Find the height of the cylinder (C.S.A. of cylinder = 2πrh).
Subtract b(b2 + b – 7) + 5 from 3b2 – 8 and find the value of expression obtained for b = – 3.
