the difference from 240 to 120 is 50%

By the quadratic formula,

Then


Multiply numerator and denominator by the denominator's conjugate:

X=-2
5-4=1
so whatever is square rooted must be equal to 1
1 squared is 1
-2+3 is one
Split the shape in to two this is the rectangular side.
15+6=21
21×7=147
147×4=588in
square shape
6+6=12
12×12=144
144×4=576in
then add the answers together
588+576=1164in
1164 is how many more inches greater