Evaluate the function at the given values of the independent variables. $z = x ^ { 3 } + 2 x y + 3 y ^ { 2 } , \quad x = - 9 , y = 7$
A) $z = - 708$
B) $z = 102$
C) $z = - 600$
D) $z = - 568$
E) $z = 174$

Question

Quizplus · Accepted Answer

Substituting $x = -9$ and $y = 7$ into the equation $z = x^3 + 2xy + 3y^2$, we get $z = (-9)^3 + 2(-9)(7) + 3(7)^2 = -729 - 126 + 147 = -708$.

Evaluate the Function at the Given Values of the Independent z=x3+2xy+3y2,x=−9,y=7z = x ^ { 3 } + 2 x y + 3 y ^ { 2 } , \quad x = - 9 , y = 7z=x3+2xy+3y2,x=−9,y=7

Evaluate the Function at the Given Values of the Independent $z = x ^ { 3 } + 2 x y + 3 y ^ { 2 } , \quad x = - 9 , y = 7$