甲乙两同学分解因式x^2+mx+n甲看错了n,分解结果为(x+2)(x+6);乙看错了m,分解结果为(x-1)(x-16)分析m和n的值,
解,得:
(x+6)(x+2)=x²+8x+12
n=12
(x-1)(x-16)=x²-17x-16
m=-17
正确为:
x²-17x+12
甲乙两同学分解因式x^2+mx+n甲看错了n,分解结果为(x+2)(x+6);乙看错了m,分解结果为(x-1)(x-16)分析m和n的值,
解,得:
(x+6)(x+2)=x²+8x+12
n=12
(x-1)(x-16)=x²-17x-16
m=-17
正确为:
x²-17x+12