Solve using the quadratic formula
By including its plus or minus signs
you do 3 plus 5 first then you get 8 you have to find out what minus 7 equals 8
15x minus 8=minus 180 3x+8=24
It is an equation with the plus or minus signs missing which makes it impossible to solve.
x = 25 / 3squared + 5
Your question does not make sense. It would probably be interpreted as a + = ++a ---a