Which expression could be used to solve this problem?
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The value of the expression f(x,y)=139- at (3,-9) is 49.
Given that the expression is f(x,y)=139- and point (3,-9).
We are required to find the value of the expression f(x,y)=139- at (3,-9).
Expression is basically a combination of numbers, fractions, symbols, coefficients,determinants,indeterminants. They are mostly not found in equal to form.
Expression is f(x,y)=139-.
To find the value of expression f(x,y) at (3,-9).
f(3,-9)=139- (Squaring 3 and -9)
f(3,-9)=139-9-81 (Now add 9 and 81 and put minus sign before the result)
f(3,-9)=139-90
f(3,-9)=49 (Now subtract 90 from 139)
Hence the value of the expression f(x,y)=139- at (3,-9) is 49.
Learn more about expressions at brainly.com/question/723406
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