(-w)(-10w^3)

Answer 1

recall the properties of multiplication

(-w)(-10w^3)
= (-w)(-10)(w^3)
= (-1)(w)(-10)(w^3)
= (-1)(-10)(w)(w^3)
= 10w^4

Answer 2

@Steve where does the negative 1 come from, bc without it it would be negative ten