2
38
x = -2/3,7/6
(x^2 - 4)(x^2 + 9) set to zero to see roots ( watch out for the surprise! )
x^2 +9 =x^2 -9 9=-9 No solution
2
It is: 9-4 = 5
3x2 when x = 2 is the answer 3 X 4 = 12 or is the answer (3 X 2)2 = 62 = 36
4 squared minus 2 squared equals 12
0 = 2m^2 - 2m + 36 0 = 2(m^2 - m + 18) 0 = m^2 - m + 18
38
x = -2/3,7/6
(x^2 - 4)(x^2 + 9) set to zero to see roots ( watch out for the surprise! )
x^2 +9 =x^2 -9 9=-9 No solution
x = ±2
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