Simplify: (3a – 4b)(a + b). a.. 3a2– ab – 4b2. b.. 3a2 – 7ab – 4b2. c.. 3a2 – 12ab – 4b2. d.. 3a2 + ab – 4b2.

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.