(1)-2ab2+4a2b-10b (2)x2y2+y4+x4 (3)25a4-10a2+1 (4)x2-x-6 (5) xy-xz+y-z (6)16-(x+y)2

问题描述:

(1)-2ab2+4a2b-10b (2)x2y2+y4+x4 (3)25a4-10a2+1 (4)x2-x-6 (5) xy-xz+y-z (6)16-(x+y)2

(1)-2ab²+4a²b-10b= -2b(b²-2b+5)(2)x²y²+y4+x4=(x²+y²)² - x²y²=(x²+xy+y²)(x²-xy+y²)(3)25a4-10a2+1=(5a² - 1)²=(√5a+1)...