point) This problem addresses some common algebraic errors. For the equalities stated below assume that x and y stand for real numbers. Assume that any denominators are non-zero. Mark the equalities with T (true) if they are true for all values of x and y, and F (false) otherwise.
(x+y) 2 = x 2 +y 2
(x+y) 2 = x 2 +2xy+y 2
x x+y = 1 y
x−(x+y) = y
√ x √ 2 = x
x 2 = |x|
√ x 2 +4 = x+2
1 x+y = 1 x +