Выражение. а)5(х–8)–2(5+х) б)х²(х³+х²–2)–х³(х²–1)

а)5(х–8)–2(5+х) =
= 5x - 40 - 10 -2x =
 = 3x - 50

б)х²(х³+х²–2)–х³(х²–1) =
= x^5 + x^4 - 2x^2 - x^5 + x^3 =
= - 2x^2 + x^4 + x^3

а) 5(х–8)–2(5+х) = 5x-40-10-2x = 3x-50.
б) х²(х³+х²–2)–х³(х²–1) = x⁵+x⁴-2x²-x⁵+x³ = x⁴+x³-2x².