Question 238305
Steps:
a. multiply the x outside the parenthesis by each term inside the parenthesis
b. isolate the x on one side of the equation to find its value.
.
Problem:
{{{x(25+x)}}}
{{{(x*25)+(x*x)}}}
{{{25x+x^2}}}
Now let's deduct 25x from the left side and right side of eqn
{{{x^2=-25x}}}
Now divide by x on both sides
{{{x^2/x=-25}}}
One of the x from the numerator cancels out the x in the denominator.
{{{x=-25}}} ... this is your solution.  :)