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प्रश्न
Use a suitable identity to get the following products.
(6x − 7) (6x + 7)
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उत्तर
(6x − 7) (6x + 7) = (6x)2 − (7)2 [(a + b) (a − b) = a2 − b2]
= 36x2 − 49
संबंधित प्रश्न
Use a suitable identity to get the following products.
(1.1m − 0.4) (1.1 m + 0.4)
Find the following squares by suing the identities.
`(2/3 m + 3/4 n)^2`
Use an expansion formula to find the value.
(102)2
Use the formula to find the value.
54 × 46
Expand:
`("y" - 3/"y")^2`
Factorise the following expressions
x2 + 14x + 49
(a + b)2 = a2 + b2
The difference of the squares of two consecutive numbers is their sum.
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
9x2 + 24x + 16
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.
