Find solutions to your problems with the help of IDNLearn.com's knowledgeable users. Our experts provide timely and precise responses to help you understand and solve any issue you face.

find the domain of a rational expression (x^2-16)(x-7) / (x+4)(x^2-49)

Sagot :

Domain is:

x is an element of a real number, but isn't equal to -4, 7 or -7.
(x² - 16)(x - 7) = (x³ - 7x² - 16x + 112) = 1 - 1 3/4 + 4 - 7 = -3 3/4
(x + 4)(x² - 4)       (x³ + 4x² - 4x - 16)