Question

find the value of
b.) 4x^4+x^3+ xy^2-y^3+6 for x=-2, y=5​

Answer 1

4x$4x^{4} +x^{3} +xy^{2} -y^{3}+6 \\\\4(-2)^{4}+(-2) ^{3}+(-2)(5)^{2} -(5)^{3}+6\\64-8-50-125+6= -113$

this is the answer hope it helps..