X^2+6x-16=0 solve each equation by completing the square

The solution of the equation is and

Explanation:

Given that the equation is

We need to determine the solution of the equation by completing the square.

Thus, we have,

Adding both sides of the equation by 16, we get,

Let us solve by completing the square.

To bring the equation in the form of , let us add to both of the equations.

Thus, we have,

Simplifying, we get,

Taking square root on both sides of the equation, we get,

Thus, the two solutions of the quadratic equation are

and

Simplifying the two values, we get,

and

Thus, the roots of the equation are and

; )

step-by-step explanation: ; )

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.