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प्रश्न
Expand the following:
(2x - 5) (2x + 5) (2x- 3)
उत्तर
(2x - 5) (2x + 5) (2x- 3)
= (4x2 - 25) (2x - 3)
= 8x3 - 12x2 - 50x + 75
(Using identity : (x - a) (x + b)
= x2 - (a - b) x - ab).
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संबंधित प्रश्न
Write in the expanded form:
`(a/(bc) + b/(ca) + c/(ab))^2`
Write in the expand form: `(2x - y + z)^2`
If a + b + c = 9 and ab + bc + ca = 23, find the value of a2 + b2 + c2.
If a − b = 4 and ab = 21, find the value of a3 −b3
If \[x^2 + \frac{1}{x^2} = 98\] ,find the value of \[x^3 + \frac{1}{x^3}\]
Find the following product:
Mark the correct alternative in each of the following:
If \[x + \frac{1}{x} = 5\] then \[x^2 + \frac{1}{x^2} = \]
The number x is 2 more than the number y. If the sum of the squares of x and y is 34, then find the product of x and y.
Use the direct method to evaluate the following products :
(5a + 16) (3a – 7)
Use the direct method to evaluate :
`("z"-2/3)("z"+2/3)`
