determine the domain and range of each function. f(x)=(x-2)(x+7)

f(x) = (x-2)/(x+7)

Domain is all real numbers other than -7

Domain = { x | x is real number not equal to -7}

To find range x-2 = (x+7)y

x(1-y)= 7y+2

x = (7y+2)/(1-y)

Range = { y| y is real number not equal to 1}

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