Current location - Training Enrollment Network - Mathematics courses - In the first semester, I will accompany you to study 60 pages of two factorization factors to help ① (A2-1) 2+6 (1-A2)+9② (X-Y) 2+(X2-Y2)+(X+Y) 2.
In the first semester, I will accompany you to study 60 pages of two factorization factors to help ① (A2-1) 2+6 (1-A2)+9② (X-Y) 2+(X2-Y2)+(X+Y) 2.
(1) The original formula = (1-a 2) 2+6 (1-a 2)+9.
= (1-a 2+3) 2 complete square formula
=(4-a^2)^2
= (2-a) 2 (2+a) 2 square difference formula
(2) The original formula = (x-y) 2+(x+y) (x-y)+(x+y) 2.