多年以前讨论过很多次, 好像叫什么Simon's trick?
Write the equation as (2x+1)(2y+1)= 567. Then factor 567, allowing both positive and negative factors.
多年以前讨论过很多次, 好像叫什么Simon's trick?
Write the equation as (2x+1)(2y+1)= 567. Then factor 567, allowing both positive and negative factors.
• 所以本题把左边加/减一个常数能因式分解,右边的数也加/减后找factor 就行了 -眼镜- ♂ (0 bytes) () 10/17/2022 postreply 20:36:11