Advertisements
Advertisements
Question
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
8a3 – 2a
Advertisements
Solution
We have,
8a3 – 2a = 2a(4a2 – 1)
= 2a[(2a)2 – (1)2]
= 2a(2a + 1)(2a – 1)
APPEARS IN
RELATED QUESTIONS
(5 + 20)(–20 – 5) = ?
Simplify using identities
(3p + q)(3p – q)
Using suitable identities, evaluate the following.
(132)2 – (68)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
x2 – 9
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
y4 – 625
Factorise the expression and divide them as directed:
(x3 + x2 – 132x) ÷ x(x – 11)
The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle. `(pi = 22/7)`
Verify the following:
(ab + bc)(ab – bc) + (bc + ca)(bc – ca) + (ca + ab)(ca – ab) = 0
Find the value of a, if 8a = 352 – 272
The product of two expressions is x5 + x3 + x. If one of them is x2 + x + 1, find the other.
