x2 + 49 = 0 ∴ x2 = -49 ∴ x = 7i
The answer is (3.5)2 plus (4)2 equals 410.
x2 + 6x + 9 = 81 x2 + 6x = 72 x2 + 6x - 72 = 0 (x+12)(x-6) = 0 x= -12, 6 (two solutions)
x2 + x2 = 2x2
x2+3=124 x2=121 x= square root(121) x=11
x2 + 6x - 72 = (x + 12)(x - 6)
x2≤64
(x + 12)(x - 6) = 0 x = 6 or -12
There is no integer solution. Quadratic formula gives x = -17.66 or 5.66
x2+x-6=0 * * * * * Perhaps the solution you are looking for is: x2 + x - 6 = (x - 2)(x + 3) = 0; whence, x = 2 or -3.
It equals x2 - 34
You should be able to look at this equation, or use the discriminant and know that there are no real roots.