求x2-5根号3x+18因式分解
问题描述:
求x2-5根号3x+18因式分解
还有 x3+5x2+7x+3
答
x²-5√3x+18x(x-5√3)+18x3+5x2+7x+3 =(x³+5x²+4x)+(3x+3) =x(x²+5x+4)+3(x+1) =x(x+1)(x+4)+3(x+1)=(x+1)(x²+4x+3) =(x+1)(x+1)(x+3) =(x+1)²(x+3) ...