Simplify x(x+1)−x(x−1)

2x

Step-by-step explanation:

To simplify x(x+1)−x(x−1), first step is to open the bracket = x^2 + x - x^2 + x

Be mindful of the signs, + x^2 - x^2 = 0

=0 + 2x

= 2x

the sum of the lengths of any two sides of a triangle is greater than the length of the third side. if you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. if that is not true, then it is not possible to construct a triangle with the given side lengths.

step-by-step explanation: