Advertisements
Advertisements
प्रश्न
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
8a3 – 2a
बेरीज
Advertisements
उत्तर
We have,
8a3 – 2a = 2a(4a2 – 1)
= 2a[(2a)2 – (1)2]
= 2a(2a + 1)(2a – 1)
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३६]
APPEARS IN
संबंधित प्रश्न
Using identity, find the value of (1.9) × (2.1)
Find the value of (x – y)(x + y)(x2 + y2)
a2 – b2 = (a + b) ______.
672 – 372 = (67 – 37) × ______ = ______.
(a + b)(a – b) = a2 – b2
Using suitable identities, evaluate the following.
(35.4)2 – (14.6)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`1/36a^2b^2 - 16/49b^2c^2`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
9x2 – (3y + z)2
Factorise the expression and divide them as directed:
(2x3 – 12x2 + 16x) ÷ (x – 2)(x – 4)
Verify the following:
(ab + bc)(ab – bc) + (bc + ca)(bc – ca) + (ca + ab)(ca – ab) = 0
