Paano mo paramihin at gawing simple ang frac {x ^ {2} - 3x - 10} {x ^ {2} - 4x - 12} cdot frac {6- x} {x ^ {2} - 25}?

Sagot:

# -1 / (x + 5) #

Paliwanag:

Una naming pinahihintulutan ang lahat:

(x + 2) (x-5)) / ((x + 2) (x-6)) * (6-x) / ((x-5) (x + 5) 2) (x-5) (6-x)) / ((x + 2) (x-6) (x-5) (x + 5)

kanselahin ((x-2)) kanselahin ((x-5)) (6-x)) / (kanselahin ((x + 2)) (x-6) 5)) = (6-x) / ((x-6) (x + 5)) #

# (6-x) = - (x-6) #

(X-6) / ((x-6) (x + 5)) = - 1 / (x + 5)