4. Which of the following statements is NOT true for all real numbers a and b?
(A) (a+b)? – (a - b) ² = 4ab
(B) (a - b)(a+b)=a? – b2
(C) (a+b)` = a +3a²b+3ab2 +63
(D) a – b = (a+b+)(c-b)

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)