Advertisements
Advertisements
Question
Simplify:
(b2 – 49)(b + 7) + 343
Simplify
Advertisements
Solution
We have,
(b2 – 49)(b + 7) + 343 = b2(b + 7) – 49(b + 7) + 343
= b3 + 7b2 – 49b – 343 + 343
= b3 – 49b + 7b2
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 232]
APPEARS IN
RELATED QUESTIONS
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: 95 × 105
Find the following product: \[\left( z + \frac{3}{4} \right)\left( z + \frac{4}{3} \right)\]
Find the following product: \[\left( y^2 + \frac{5}{7} \right)\left( y^2 - \frac{14}{5} \right)\]
Evaluate the following: 109 × 107
Expand the following:
(2p + 3) (2p – 4) (2p – 5)
Simplify:
(3x + 2y)2 + (3x – 2y)2
Simplify:
`(7/9 a + 9/7 b)^2 - ab`
Expand the following, using suitable identities.
`((2x)/3 - 2/3)((2x)/3 + (2a)/3)`
Using suitable identities, evaluate the following.
(98)2
Perform the following division:
(3pqr – 6p2q2r2) ÷ 3pq
