Advertisements
Advertisements
Question
Expand the following:
(2x - 5) (2x + 5) (2x- 3)
Advertisements
Solution
(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).
APPEARS IN
RELATED QUESTIONS
If x + y + z = 0, show that x3 + y3 + z3 = 3xyz.
What are the possible expressions for the dimensions of the cuboids whose volume is given below?
| Volume : 3x2 – 12x |
What are the possible expressions for the dimensions of the cuboids whose volume is given below?
| Volume : 12ky2 + 8ky – 20k |
Simplify the following
`(7.83 + 7.83 - 1.17 xx 1.17)/6.66`
If 3x - 7y = 10 and xy = -1, find the value of `9x^2 + 49y^2`
Simplify of the following:
(x+3)3 + (x−3)3
Find the following product:
(3x − 4y + 5z) (9x2 +16y2 + 25z2 + 12xy −15zx + 20yz)
Evaluate:
253 − 753 + 503
If \[\frac{a}{b} + \frac{b}{a} = 1\] then a3 + b3 =
If a - b = 7 and ab = 18; find a + b.
