Alexander B. answered • 09/04/17

Advanced Math and Science Tutoring and Test Prep online (SAT, ACT)

Assuming the side of original square X, the following equation will give a solution:

(X+12)*(X-10)=75m

Leading to the quadratic equation:

X

^{2}+ 2X - 195 = 0This could be solved using the formula for quadratic equation, or using online quadratic equation solver: http://examn8.com/QuadraticEquations.aspx

**X**(the answer)

_{1}= 13 mX

_{2}= -15 (irrelevant because the side must be represented by positive number)