Advertisements
Advertisements
प्रश्न
Use suitable identity to find the following product:
(3 – 2x) (3 + 2x)
Advertisements
उत्तर
By using the identity (x + y)(x – y) = x2 – y2,
(3 – 2x) (3 + 2x) = (3)2 – (2x)2
= 9 – 4x2
APPEARS IN
संबंधित प्रश्न
Factorise:
27x3 + y3 + z3 – 9xyz
Verify that `x^3+y^3+z^3-3xyz=1/2(x+y+z)[(x-y)^2+(y-z)^2+(z-x)^2]`
Simplify the following
`(7.83 + 7.83 - 1.17 xx 1.17)/6.66`
Evaluate of the following:
(598)3
Evaluate of the following:
1043 + 963
Simplify of the following:
\[\left( x + \frac{2}{x} \right)^3 + \left( x - \frac{2}{x} \right)^3\]
Find the following product:
If x = 3 and y = − 1, find the values of the following using in identify:
\[\left( \frac{3}{x} - \frac{x}{3} \right) \left( \frac{x^2}{9} + \frac{9}{x^2} + 1 \right)\]
If a2 + b2 + c2 − ab − bc − ca =0, then
Use the direct method to evaluate :
`("a"/2-"b"/3)("a"/2+"b"/3)`
Evaluate: `(2"x"-3/5)(2"x"+3/5)`
Evaluate: `(4/7"a"+3/4"b")(4/7"a"-3/4"b")`
Evaluate: (6 − 5xy) (6 + 5xy)
Evaluate: 20.8 × 19.2
Expand the following:
(m + 8) (m - 7)
Simplify by using formula :
`("a" + 2/"a" - 1) ("a" - 2/"a" - 1)`
Evaluate the following without multiplying:
(1005)2
If `"a" + 1/"a" = 6;`find `"a" - 1/"a"`
If `"a" + (1)/"a" = 2`, then show that `"a"^2 + (1)/"a"^2 = "a"^3 + (1)/"a"^3 = "a"^4 + (1)/"a"^4`
The coefficient of x in the expansion of (x + 3)3 is ______.
