x^2-10xy+25y^2-6x+30y+8因式分解
问题描述:
x^2-10xy+25y^2-6x+30y+8因式分解
答
原式=x²-10xy+25y²-6x+30y+8
=(x-5y)²-6(x-5y)+8 (把x-5y看成一个整体,由十字相乘法可得最后结果)
=(x-5y-2)(x-5y-4)