Work out the value of 2x2 x-1=2

Solve the equation by completing the square. x^2+2x=17

W-16=-12 solve each one step equation plz

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.