Advertisements
Advertisements
Question
Use a formula to multiply of (2a – 13)(2a + 13)
Advertisements
Solution
We use the formula: (x - a)(x + a) = x2 - a2
(2a – 13)(2a + 13)
= (2a)2 - 132
= 4a2 - 169
APPEARS IN
RELATED QUESTIONS
Use a suitable identity to get the following products.
(2y + 5) (2y + 5)
Use a suitable identity to get the following products.
(a2 + b2) (− a2 + b2)
Use a suitable identity to get the following products.
`(x/2 + (3y)/4)(x/2 + (3y)/4)`
Find the following squares by suing the identities
(0.4p − 0.5q)2
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.
2x3 + 24x2 + 72x
Factorise the following.
18 + 11x + x2
The height of a triangle is x4 + y4 and its base is 14xy. Find the area of the triangle.
Verify the following:
(7p – 13q)2 + 364pq = (7p + 13q)2
