Advertisements
Advertisements
प्रश्न
Factorise the following using suitable identity
x2 – 8x + 16
योग
उत्तर
x2 – 8x + 16 = x2 – (2 × 4 × x) + 42
This expression is in the form of identity
a2 – 2ab + b2 = (a – b)2
x2 – 2 × 4 × x + 42 = (x – 4)2
∴ x2 – 8x + 16 = (x – 4)(x – 4)
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Algebra - Exercise 3.1 [पृष्ठ ६२]
APPEARS IN
संबंधित प्रश्न
Expand `("x"-2/"x")^2`
Factorise the following expressions
y2 – 10y + 25
(p – q)2 = _______________
(a – 1)2 = a2 – 1
a2 – b2 is equal to ______.
(a – b)2 = a2 – b2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
y2 – 14y + 49
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
9x2 – 12x + 4
Factorise the following.
x2 + 4x – 77
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).
