Advertisements
Advertisements
प्रश्न
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 6x + 9
योग
Advertisements
उत्तर
We have,
x2 + 6x + 9
= x2 + 2 × 3 × x + 32
= (x + 3)2 ...[∵ a2 + 2ab + b2 = (a + b)2]
= (x + 3)(x + 3)
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३४]
APPEARS IN
संबंधित प्रश्न
Use the formula to multiply the following.
(a + 6) (a − 6)
Use the formula to find the value.
97 × 103
Expand: (10 + y)2
Use a formula to multiply of (x - 5)(x + 5).
Expand (3m + 5)2
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 14x + 49
The cost of a chocolate is Rs (x + y) and Rohit bought (x + y) chocolates. Find the total amount paid by him in terms of x. If x = 10, find the amount paid by him.
If p + q = 12 and pq = 22, then find p2 + q2.
Verify the following:
(a + b)(a + b)(a + b) = a3 + 3a2b + 3ab2 + b3
Factorise p4 + q4 + p2q2.
