Come take part in simple mathematics quiz.?

[Jef]

Expand the following:

Q1) (3 - a)(9 + 3a + a^2)
Q2) (2x + 1)(x^2 - 3x - 4)
Q3) (a + 2)(3a^2 - 5a + 6)
Q4) (p - 2q)(2p + 3q - 1)

Solve these questions correct with detailed workings and earn points!!!
The lucky person with the best answer will be voted as the "BEST ANSWER".
Voting of the best answer will take place after 12hours!!.

[Mark]

Multiply everything by everything. That's the rule

27 + 9a + 3aa + (-9a) + (-3aa) + (-aaa).

[masterofmagic]

Q1) (3 - a)(9 + 3a + a^2)
= 3(9 + 3a + a^2) - a(9 + 3a + a^2)
= 27 + 9a + 3a^2 - 9a - 3a^2 - a^3
= 27 - a^3

Q2) (2x + 1)(x^2 - 3x - 4)
= 2x(x^2 - 3x - 4) + 1(x^2 - 3x - 4)
= 2x^3 - 6x^2 - 8x + x^2 - 3x - 4
= 2x^3 - 5x^2 - 11x - 4

Q3) (a + 2)(3a^2 - 5a + 6)
= a(3a^2 - 5a + 6) + 2(3a^2 - 5a + 6)
= 3a^3 - 5a^2 + 6a + 6a^2 - 10a + 12
= 3a^3 + a^2 - 4a + 12

Q4) (p - 2q)(2p + 3q - 1)
= p(2p + 3q - 1) - 2q(2p + 3q - 1)
= 2p^2 + 3pq - p - 4pq - 6q^2 + 2q
= 2p^2 - pq - 6q^2 - p + 2q

Interesting way to get people to do your homework for you.

[Ashish]

1........-a^3+27
2........2x^3-5x^2-11x-4
3........3a^3+a^2-4a+12
4........2p^2-p-pq+2q-6q^2

i hope these are correct !!

[Yep]

I say f*ck it and grab a beer!