Which identity resulted from the proof in part A, which showed that a triangle with side lengths x2 − 1, 2x, and x2 + 1 is a right triangle? a. (x^2 − 1)^2 − (2x)^2 = (x^2 + 1)^2 b. -(x^2 − 1)^2 + (2x)^2 = (x^2 + 1)^2 c. (x^2 − 1)^2 + (2x)^2 = (x^2 + 1)^2 d. (x^2 − 1)^2 + (2x)^2 = -(x^2 + 1)^2

Which function is increasing? o a. f(x)=(1/15)* o b. f(x)= (0.5)* o c. f(x)=(1/5)* o d. f(x) = 5*

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

Factor the polynomial. b^2 + 4b + 4