Advertisements
Advertisements
प्रश्न
Expand (5a + 6b)2
Advertisements
उत्तर
It is known that (a + b)2 = a2 + 2ab + b2 and (a − b)2 = a2 − 2ab + b2.
(5a + 6b)2
= (5a)2 + 2 × (5a) (6b) + (6b)2
= 25a2 + 60ab + 36b2
संबंधित प्रश्न
Use a suitable identity to get the following products.
(a2 + b2) (− a2 + b2)
Use a suitable identity to get the following products.
(− a + c) (− a + c)
Find the following squares by suing the identities.
(6x2 − 5y)2
Using identities, evaluate 297 × 303
Using a2 − b2 = (a + b) (a − b), find 12.12 − 7.92
Expand: (2x + 3y)2
The difference of the squares of two consecutive numbers is their sum.
The cost of a chocolate is Rs (x + y) and Rohit bought (x + y) chocolates. Find the total amount paid by him in terms of x. If x = 10, find the amount paid by him.
If a2 + b2 = 74 and ab = 35, then find a + b.
Factorise p4 + q4 + p2q2.
