Question

помогите ❤️❤️❤️❤️❤️​

Answer 1

Объяснение:

$2.\\\ 8^9+8^8+8^7=8^7*(8^{9-7}+8^{8-7}+8^{7-7})=8^7*(8^2+8^1+8^0)=\\=8^7*(64+8+1)=73*8^7.$

$3.\\(x-2)*(x^2+2x+4)=x^3+2x\\x^3-8=x^3+2x\\2x=-8\ |:2\\x=-4.$