x2 + 20x = 10
To solve for x, we can start by rearranging the equation as follows:
x^2 + 20x - 10 = 0
Next, we can use the quadratic formula to solve for x:
x = (-20 ± √(20^2 - 4(1)(-10))) / 2(1)
x = (-20 ± √440) / 2
x = (-20 ± 2√110) / 2
x = -10 ± √110
Therefore, there are two possible solutions: x = -10 + √110 and x = -10 - √110.