It is: 9-4 = 5
2
4 squared minus 2 squared equals 12
x = -2/3,7/6
(-x)2 = 3=> -x = ±√3=> x = -√3 and x = √3
x^2 +9 =x^2 -9 9=-9 No solution
It is: 2n^2 -5n -42 equals (2n+7)(n-6) when factored
It is a quadratic equation and its solutions are: x = -3/2 and x = 3
72 minus the root of squared minus equals 72 but you have to be smart to know that the minimum circumference s 56 there you go
x = -28 / -11^2
1/2 = 25/50
Yes and x = 2+square root of 6 or x = 2-square root of 6
The solutions are: x = 4, y = 2 and x = -4, y = -2