Advertisements
Advertisements
Question
Use a formula to multiply of (2a – 13)(2a + 13)
Sum
Advertisements
Solution
We use the formula:
(x − a)(x + a) = x2 − a2
(2a – 13)(2a + 13)
= (2a)2 − 132
= 4a2 − 169
shaalaa.com
Is there an error in this question or solution?
Chapter 15.5: Miscellaneous Problems : Set 2 - Exercise [Page 100]
APPEARS IN
RELATED QUESTIONS
Use a suitable identity to get the following products.
(7a − 9b) (7a − 9b)
Simplify (7m − 8n)2 + (7m + 8n)2
Using (x + a) (x + b) = x2 + (a + b) x + ab, find 9.7 × 9.8
Which of the options given below is the square of the binomial `(8-1/"x")`?
Of which of the binomials given below is m2n2 + 14mnpq + 49p2q2 the expansion?
Factorise the following using suitable identity
y2 + 20y + 100
The sum of areas of two squares with sides 4a and 4b is ______.
The difference of the squares of two consecutive numbers is their sum.
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
4x2 + 4x + 1
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
4x4 + 12x3 + 9x2
