Question

Solve
-3 (u^2- uv)+ 6-uv
if u= -3 and v=-7​

Answer 1

Answer:

$u = - 3 \\ v = - 7 \\ \\ - 3( {u}^{2} - uv) + 6 - uv \\ - 3( {( - 3)}^{2} - ( - 3)( - 7)) + 6 - ( - 3)( - 7) \\ = - 3(9 - (( - 3) \times ( - 7))) + 6 - (( - 3) \times ( - 7)) \\ = - 3(9 - 21) + 6 - 21 \\ = - 3( - 12) + 6 - 21 \\ = 36 + 6 - 21 \\ = \underline{ \underline{ 21}}$