Question

If x = −2 and y = 5, evaluate −x2 − xy2

Answer 1

46

Answer 2

\[-x^2-xy^2\]

\[-(-2)^2-(-2)(5)^2\]

\[-4-(-2)(25)\]

\[-4+50\]

\[46\]


So \[-x^2-xy^2=46\] when x = −2 and y = 5