Solve by completing the square: 8x^2+16x=42 show steps

Hi,

Equation:



Work:

Divide both sides of equation with 2.



Move constant 21 to the left and change its sign.



Write 8x as a difference.



Factor out 2x from the expression.



Factor out 2x + 7 from the expression.



When the product of factors is 0, at least one factor is 0.



Solve equation for x.



The final solutions are:



Hope this helps.
r3t40

the answer would be c ≈ 18.852*3.14= 6.286.28*3=18.85