Advertisements
Advertisements
Question
Factorise the following.
x2 + 4x – 77
Sum
Advertisements
Solution
We have,
x2 + 4x – 77
= x2 + (11 – 7)x – 77
= x2 + 11x – 7x – 77
= x(x + 11) – 7(x + 11)
= (x + 11)(x – 7)
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 235]
APPEARS IN
RELATED QUESTIONS
Expand (2)2p − 3q
Expand `("a"-1/"a")^2`
(p – q)2 = _______________
Evaluate the following, using suitable identity
472
Factorise the following using suitable identity
64x2 – 112xy + 49y2
Square of 9x – 7xy is ______.
1032 – 1022 = ______ × (103 – 102) = ______.
Using suitable identities, evaluate the following.
(9.9)2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
`9y^2 - 4xy + (4x^2)/9`
Verify the following:
(a – b)(a – b)(a – b) = a3 – 3a2b + 3ab2 – b3
