因式分解 x2-y2+4x+6y-5x、y后面的都是指数,注意是因式分解,要有过程的哈,

问题描述:

因式分解 x2-y2+4x+6y-5
x、y后面的都是指数,注意是因式分解,要有过程的哈,

=x2+4x+4-(y6-6y+9)
=(x+2)平方-(y-3)平方
=(x+2+y-3)(x+2-y+3)=(x+y-1)(x-y+5)

x2-y2+4x+6y-5
=X^2+4X+4-(Y^2-6Y+9)
=(X+2)^2-(Y-3)^2
=(X+2-Y+3)(X+2+Y-3)
=(X-Y+5)(X+Y-1)

x² - y² + 4x + 6y - 5= x² + 4x + 4 - y² + 6y - 9= (x² + 4x + 4) - (y² - 6y + 9)= (x + 2)² - (y - 3)²= (x + 2 + y - 3)(x + 2 - y + 3)= (x + y - 1)(x - y + 5)