Advertisements
Advertisements
Question
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 6x + 9
Sum
Advertisements
Solution
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
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 234]
APPEARS IN
RELATED QUESTIONS
Using a2 − b2 = (a + b) (a − b), find 12.12 − 7.92
Expand (ax + by)2
Use an expansion formula to find the value.
(997)2
Use an expansion formula to find the value.
(1005)2
Expand:
(10 + y)2
Use a formula to multiply of (4z – 5y)(4z + 5y)
Use a formula to multiply of (2t – 5)(2t + 5)
Show that (x + 2y)2 – (x – 2y)2 = 8xy
If a2 + b2 = 74 and ab = 35, then find a + b.
Find the length of the side of the given square if area of the square is 625 square units and then find the value of x.
