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

Question

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

anonymous · Answer

x+3

asnaseer · Answer

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.

anonymous · Answer

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

asnaseer · Answer

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.

asnaseer · Answer

so what do you think the answer is?

anonymous · Answer

i said b

asnaseer · Answer

perfect! - well done.

anonymous · Answer

thanks