Advertisements
Advertisements
प्रश्न
Expand the following square, using suitable identities
(b – 7)2
Advertisements
उत्तर
(b – 7)2
Comparing (b – 7)2 with (a – b)2 we have a = b and b = 7
(a – b)2 = a2 – 2ab + b2
(b – 7)2 = b2 – 2(b)(7) + 72
(b – 7)2 = b2 – 14b + 49
APPEARS IN
संबंधित प्रश्न
Expand `("x"-2/"x")^2`
(a – 1)2 = a2 – 1
Factorise the following using suitable identity
64x2 – 112xy + 49y2
Factorised form of 4y2 – 12y + 9 is ______.
(a – b)2 = a2 – b2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
x2 – 10x + 25
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
p2 – 2p + 1
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
`9y^2 - 4xy + (4x^2)/9`
Factorise the following.
y2 – 2y – 15
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).
