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There is, for example, no operator between 2 and 10X.
21
Factorising, we obtain, x2 + 10x + 21 = (x + 7)(x + 3). Thus, x2 + 10x + 21 / (x + 3) = x + 7. That's usually easier than dividing it out!
(x2+10x+21)/(x+3) = (x+7)
x2 + 10x + 21 = (x + 3)(x + 7)
That doesn't factor neatly. Applying the quadratic equation, we find two imaginary solutions: (-7 plus or minus the square root of -371) divided by 10x = -0.7 + 1.9261360284258224ix = -0.7 - 1.9261360284258224iwhere i is the square root of negative one.
10x+15 = 7x-21 10x-7x = -21-15 3x = -36 x = -12 Which is the solution to the above equation when simplified.
2x-3 = 21+10x 2x-10x = 21+3 -8x = 24 x = -3
-3x + 10x - 5 + 26 = 7x + 21
390,676.238095
x2+10x+21 = (x+3)(x+7)
2x-3=10x+21 2x-3-2x=10x+21-2x -3=8x+21 -3-21=8x+21-21 -24=8x -3=x
There is no need to simplify this, it is only a sum. 21 + (10/2) - 18 = 8