Answer: x= 1.6 and -7.6
Explanation:
Given the equation 12 = x²+6x
Firstly, we will equate the equation to zero by taking 12 to other side to give;
x²+6x-12 = 0
Using the general formula to solve
If ax²+bx+c=0
x = -b+-√b²-4ac/2a
From the equation given
a = 1 b =6, c=-12
x = -6+-√6²-4(1)(-12)/2(1)
x = -6+-√37+48/2
x = -6+-√85/2
x = -6+-9.2/2
x = -6+9.2/2 and -6-9.2/2
x = 3.2/2 and -15.2/2
x = 1.6 and -7.6