Question

(+10x^7) : (-5x^4) : (-2x^2)=

Answer 1

$(10x^7)\div(-5x^4)\div(-2x^2)= \\ \\ (10)\div(-5)x^{7-4}\div(-2x^2)= \\ \\ (-2x^3)\div(-2x^2)= \\ \\ (-2)\div(-2)x^{3-2}= \\ \\ +1x^1=x$