Question 1066719
Greatest value of a sum choose the greatest value for both variables,
{{{2x+3y=2(3)+3(6)=6+18=24}}}
24
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.
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Least value of a product choose the greatest of one variable and least value of the other variable, compare the products.
{{{3xy=3(-5)6=-90}}}
{{{3xy=3(3)-8=-72}}}
-90
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.
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Greatest value of sum of squares choose largest absolute value of both variables,
{{{x^2+y^2=(-5)^2+(-8)^2=25+64=89}}}
89
.
.
Least value of x^2-y^2, choose largest value of absolute value of x and smallest value of absolute value of y,
{{{x^2-y^2=(-5)^2-0^2=25}}}
25