Advertisements
Advertisements
Question
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
9x2 – 12x + 4
Sum
Solution
We have,
9x2 – 12x + 4 = (3x)2 – 2 · 3x · 2 + 22
= (3x – 2)2
= (3x – 2)(3x – 2)
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 234]
APPEARS IN
RELATED QUESTIONS
Expand `("a"-1/"a")^2`
Evaluate the following, using suitable identity
9982
Using suitable identities, evaluate the following.
(9.9)2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
a2y2 – 2aby + b2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
4y2 – 12y + 9
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
`x^2/4 - 2x + 4`
Factorise the following.
y2 – 2y – 15
Factorise the following.
x2 – 17x + 60
If x – y = 13 and xy = 28, then find x2 + y2.
If m – n = 16 and m2 + n2 = 400, then find mn.
