Consider this multivariable function. f(x,y)=xy+2x+y−36a) What is the value of f(2,−3)?b) Find all x-values such that f (x,x) = 0

snowlovelydayM 2021-02-09 Answered

Consider this multivariable function. f(x,y)=xy+2x+y36
a) What is the value of f(2,3)?
b) Find all x-values such that f(x,x)=0

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Expert Answer

Nola Robson
Answered 2021-02-10 Author has 94 answers

a) We find f(2,3) be replacing x by 2 and by -3 in f(x,y)
f(2,3)=2(3)+2(2)+(3)36
f(2,3)=6+4336=41
b) Now, we solve f(x,x)=0 as follow.
f(x,x)=0
x2+2x+x36=0
x2+3x36=0
x=b±b24ac2a=(3±324(1)(36)))2(1)=3±1532

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