What is the factored form

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

32a³b² 8ab² simplify the following expression.

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.