The following formulas can be calculated by the adjustment formula A.(x+1)(1+x) B.(1/2a+b)(b-1/2a) c.(-a+b)(a-b) d.(x^2-y)(x+y^2)

The following formulas can be calculated by the adjustment formula A.(x+1)(1+x) B.(1/2a+b)(b-1/2a) c.(-a+b)(a-b) d.(x^2-y)(x+y^2)

B.(1/2a+b)(b-1/2a)