Advertisements
Advertisements
Question
Use the direct method to evaluate the following products :
(3x – 2y) (2x + y)
Advertisements
Solution
(3x – 2y) (2x + y) = (3x × 2x) + (3x × y) + (−2y × 2x) + (−2y × y)
= 6x2 + 3xy − 4xy − 2y2
= 6x2 − xy − 2y2
APPEARS IN
RELATED QUESTIONS
What are the possible expressions for the dimensions of the cuboids whose volume is given below?
| Volume : 12ky2 + 8ky – 20k |
Simplify the following product:
(x2 + x − 2)(x2 − x + 2)
Simplify the following expressions:
`(x^2 - x + 1)^2 - (x^2 + x + 1)^2`
If \[x - \frac{1}{x} = 7\], find the value of \[x^3 - \frac{1}{x^3}\].
Find the value of 27x3 + 8y3, if 3x + 2y = 14 and xy = 8
Find the following product:
(2ab − 3b − 2c) (4a2 + 9b2 +4c2 + 6 ab − 6 bc + 4ca)
If \[x - \frac{1}{x} = \frac{1}{2}\],then write the value of \[4 x^2 + \frac{4}{x^2}\]
If a2 - 3a - 1 = 0 and a ≠ 0, find : `"a" + (1)/"a"`
If a2 + b2 + c2 = 41 and a + b + c = 9; find ab + bc + ca.
Simplify:
(3a - 7b + 3)(3a - 7b + 5)
