Well
we know that the formula for a diagonal is:

so using this we can conclude that the length and the width of this particular square would be 7.071 cm. Hope this helps!
https://www.khanacademy.org/math/algebra/one-variable-linear-inequalities/compound-inequalities/v/compound-inequalities
Once you see that it will be the first video that you will click on. Let see if that helps you or if it doesn't help then you can ask your teacher to help you.
Step-by-step explanation:
=((5m+6)(m−7)(5m+6))(m)+((5m+6)(m−7)(5m+6))(−7)
=25m4−115m3−384m2−252m−175m3+805m2+2688m+1764
=25m4−290m3+421m2+2436m+1764
24 numbers are inbetween 20 and 45.