I need help with the following questions, they're from my text book but I can't seem to figure them out and I'd like to use these problems as notes for better understanding.

Solve the equation:
x^2 - x = 12

A) -3,-4 B) 1,12 C) -3,4 D) 3,4

6c^3 - 27c^2 + 30c = 0

A) 0 B) 2,-2 C) 2, 5 over 2, D) 3, 5 over 3

Find the numerical value of the expression for the given value x.

_3_-_2x_, x=2
...9x

Find all values that make the expression undefined.

__2x_+__2__
x^2 + 17x + 70

__tx_+_t_+_3x_+_3__
........6x + 6

Multiply. Write the answer in lowest terms.

__k^2_+_7k_+_12_ • __k^2_+_9k__
...k^2 + 13k + 36..........k^2 - 6k - 27

Perform the indicated operation. Write the answer in lowest terms.

(__x^2_-4x_-_21__ • __x2_-_7x___) ÷ __x_+_3__
(........7x..................x^2 - 14x + 49)..........x + 7

Perform the indicated operation and simplify.

__4x_-9__ + __7x_+_6__
......x....................3x

Simplify the complex fraction.

..___x^6___
____ 4y^9_____
....__x^3___
.......y^4

Solve the equation.

__26__ = 3 - _1_
....x..............x

Note*
Disregard the periods, they're just there so you guys can better understand it.

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