4x-12/x^{2 +4x-21}
4x-12/x^{2 +4x-21}
If we assume that Nataliya is right and the question is
(4x - 12) / (x2 + 4x - 21)
We can simplify it like so
(2x-3.46)/(x+2x-4.58): This takes the square root of your original equation
Zoltan, if I am right, then answer will be 3 / (x + 7) :)
Can you work that out for me? It seems a bit at odds with the x squared term. :)
You need to factor out the numerator and denominator in order to simplify.
Original: (4x-12)/(x^2+4x-21)
Factor Top: [4(x-3)]/(x^2+4x-21)
Factor Bottom: [4(x-3)]/[(x-3)(x+7)]
Cancel like terms: [4(x-3)]/[(x-3)(x+7)]
Simplified term: 4/(x+7)
Comments
Olalekan, you have to use parenthesis! Is your question to simplify the expression
(4x - 12) / (x^{2} + 4x - 21) ?