Advertisements
Advertisements
प्रश्न
Factorise.
(l + m)2 − (l − m)2
बेरीज
Advertisements
उत्तर
(l + m)2 − (l − m)2
Using the identity a2 − b2 = (a − b) (a + b)
= [(l + m) + (l − m)] [(l + m) − ( l − m)]
= (l + m + l − m) (l + m − l + m)
= (2 m) (2 l)
= 4 lm
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Factorise the following expression.
25m2 + 30m + 9
Factorise the following expression.
(l + m)2 − 4lm (Hint: Expand (l + m)2 first)
Factorise.
49x2 − 36
Factorise.
25a2 − 4b2 + 28bc − 49c2
Factorise the expression.
2x3 + 2xy2 + 2xz2
Factorise the expression.
5y2 − 20y − 8z + 2yz
Factorise.
p4 − 81
Factorise.
a4 − 2a2b2 + b4
Factorise the following expression:
2a² + 4a²b + 8a²c
Factorise the following expression:
ab – ac – mb + mc
