Question

Помагите пж 35.19 3,4 пример​

Answer 1

$3) 5(x-6)^3-13(2+x)^3+32=-8x^2(x+21)\\5(x^3-18x^2+108x-216)-13(8+12x+6x^2+x^3)+32=-8x^3-168x^2\\5x^3-90x^2+540x-1080-104-156x-78x^2-13x^3+32=-8x^3-168x^2\\8x^3-168x^2+384x-1152=-8x^3-168x^2\\38x=1152\\x=3.\\\4)-6(4+x)^3+3(5-x)^3=1017-9x^2(3+x)\\-6(64+48x+12x^2+x^3)+3(125-75x+15x^2-x^3)=1017-27x^2-9x^3\\-384-288x-72x^2-6x^3+375-225x+45x^2-3x^2=1017-27x^2-9x^3\\-9-513x-27x^2-9x^3=1017-27x^2-9x^3\\-513x=1017+9\\-513x=1026\\x=-2.$