The polynomial expressions 3x + 5, 4x2 – 7x, 5x + 1, and 2x2 + 13x represent the lengths of the
sides of a quadrilateral for all whole-number values
of x > 1. Which is the expression for the perimeter
of the quadrilateral?

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?

oh

nu stiu chiar nu stiu sa o fac