(a+b) 2 = a 2 + b 2 + 2ab (a-b) 2 = a 2 + b 2 – 2ab (a+b) (a-b) = a 2 – b 2 (x + a)(x + b) = x 2 + (a + b)x + ab (x + a)(x – b) = x ...
No comments:
Post a Comment