1.Find the integer(整数) which satisfies the equation

题目

1.Find the integer(整数) which satisfies the equation
x^3-x^2-11x+3=0
2.Find in the form a+b|3(3开方 抱歉 我实在找不到根号),where a and b are integers,the other values which satisfy the equation (就是求整数a和b)
我第一问会做 就是第二问不会

答案

1)
x^3-x^2-11x+3=0
(x^3+3x^2)-(4x^2+12x)+(x+3)=0
(x+3)(x^2-4x+1)=0
x=-3
2)
where's the equation?