Question

Find the sum of all solutions to the equation 3x(x+4) = 66.

Answer 1

Answer:

18

Step-by-step explanation:

3×(X+4)=66

3X+12=66

3X=66-12

X=54÷3

X=18

Answer 2

Answer:

given equation=3x(x+4)=66

that is x(x+4)=22

=>x^2+4x-22=0

$x = \frac{ - b + - \ \sqrt{ {b}^{2} - 4ac } }{2a}$from above formula

x=-(-4+√106)/2 or

x=(-4-√106)/2

are solutions of given equation

so sum=-8/2=-4