x2-2√2x-3因式分解
问题描述：
x2-2√2x-3因式分解
答
x^2-2√2x-3
=(x^2-2√2x+2)-5
=(x-√2)^2-5
=(x-√2+√5)(x-√2-√5)
答
x²-2√2x-3
=（x²-2√2x+2）-5
=（x-√2)²-(√5)²
=(x-√2+√5)(x-√2-√5)