Question

Which of the following is the simplified form of ?
(x^2-9)/(x-3)

Answer 1

x+3

Answer 2

remember that:\[a^2-b^2=(a+b)(a-b)\]so:\[x^2-9=x^2-3^2=(x+3)(x-3)\]this can be used to cancel the (x-3) terms from numerator and denominator to get the answer @jimmyrep gave.

Answer 3

A,b,c or d

x – 3, with the restriction x ≠ 3

x + 3, with the restriction x ≠ 3


x – 3, with the restriction x ≠ –3

x + 3, with the restriction x ≠ –3

Answer 4

remember we got the answer x+3 by dividing the numerator and denominator by (x-3). we cannot do this if x=3 as then we would be dividing by zero which is not a valid operation.

Answer 5

so what do you think the answer is?

Answer 6

i said b

Answer 7

perfect! - well done.

Answer 8

thanks