-2xa(-4xb - 2x³ + 5) use the distributive property to solve
-2xa(-4xb) - 2xa(-2x³) - 2xa(+5)
8x²ab + 4x⁴a - 10xa (this is the answer based on the expression)
Your answers do not math what your question is asking for...there is no way to multiply and come up with an answer of +b in the first section.
make sure you are giving the correct problem written correctly.