Advertisements
Advertisements
प्रश्न
Expand the following:
(3x + 4) (2x - 1)
Advertisements
उत्तर
(3x + 4) (2x - 1)
= 6x2 - 3x + 8x - 4
= 6x2 + 5x - 4
(Using identity : (x+ a) (x -b)
= x2 + (a - b) x - ab).
APPEARS IN
संबंधित प्रश्न
Factorise the following using appropriate identity:
4y2 – 4y + 1
Evaluate the following using identities:
117 x 83
if `x^2 + 1/x^2 = 79` Find the value of `x + 1/x`
If a + b = 10 and ab = 21, find the value of a3 + b3
Find the following product:
\[\left( \frac{x}{2} + 2y \right) \left( \frac{x^2}{4} - xy + 4 y^2 \right)\]
If \[x + \frac{1}{x} = 3\] then \[x^6 + \frac{1}{x^6}\] =
If x + y = `7/2 "and xy" =5/2`; find: x - y and x2 - y2
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.
If x + y + z = 12 and xy + yz + zx = 27; find x2 + y2 + z2.
If `x^2 + (1)/x^2 = 18`; find : `x - (1)/x`
