Advertisements
Advertisements
प्रश्न
Evaluate: `(2"x"-3/5)(2"x"+3/5)`
Advertisements
उत्तर
`(2"x"-3/5)(2"x"+3/5)`
`=(2"x")^2-(3/5)^2` .......[ ∵ (a − b) (a + b) = a2b2]
`=4"x"^2-9/25`
APPEARS IN
संबंधित प्रश्न
Factorise the following using appropriate identity:
4y2 – 4y + 1
Expand the following, using suitable identity:
(–2x + 3y + 2z)2
Give possible expression for the length and breadth of the following rectangle, in which their area are given:
| Area : 25a2 – 35a + 12 |
Find the value of 27x3 + 8y3, if 3x + 2y = 20 and xy = \[\frac{14}{9}\]
Find the following product:
\[\left( 3 + \frac{5}{x} \right) \left( 9 - \frac{15}{x} + \frac{25}{x^2} \right)\]
If \[x + \frac{1}{x}\] 4, then \[x^4 + \frac{1}{x^4} =\]
Use the direct method to evaluate :
`("z"-2/3)("z"+2/3)`
Simplify by using formula :
`("a" + 2/"a" - 1) ("a" - 2/"a" - 1)`
Simplify:
(7a +5b)2 - (7a - 5b)2
If a + b + c = 9 and ab + bc + ca = 26, find a2 + b2 + c2.
