book Maths Puzzle Numerical Ability

how am I to solve an inequality of this type(x+2)(x+2)/(x+1)<0 using cases

Read Solution (Total 0)

book Other Question

The sides of the triangle are 6,7,and x. What is the largest value that could be the area of such a triangle? Here is the question:
2v(3v2-1) - (6-8v3+14v)+3

here is my attempt:
6v3-2v - 6+6v2+3
4v2-3=6v2

What is the rule with exponents ?

~Tabitha