Advertisements
Advertisements
प्रश्न
Factorise the following expressions
y2 – 10y + 25
Advertisements
उत्तर
y2 – 10y + 25 = y2 – 10y + 52
Comparing with a2 – 2ab + b2 = (a – b)2 we get a = y, b = 5
⇒ y2 – 2(y)(5) + 52 = (y – 5)2
∴ y2 – 10y + 25 = (y – 5)2
APPEARS IN
संबंधित प्रश्न
Expand the following square, using suitable identities
(b – 7)2
Factorise the following using suitable identity
64x2 – 112xy + 49y2
Square of 9x – 7xy is ______.
(a – b) ______ = a2 – 2ab + b2
Factorised form of 4y2 – 12y + 9 is ______.
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
a2y3 – 2aby2 + b2y
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).
If m – n = 16 and m2 + n2 = 400, then find mn.
If `x - 1/x = 7` then find the value of `x^2 + 1/x^2`.
