Simplify. X+7/ x^2+4x-21

Question

A. 1/x-3; where x *i don't know how to do the symbol* 3,-7
B. X-3; where x 3
C. 1/x-7; where x 7**
D. X-7

Simplify. X^2-3x-18/x+3
A. X-3
B. X-6; where x -3
C. X-6; where x 6**
D. 1/x+3; x -3

Answer 1

You can use =/= for not equal. Or, you can find a site with math symbols, and copy/paste the ≠ character.

How can you choose both A and C?
(x+7) is a common factor, so A is the choice.

Similarly, the second one is B.

check your math.