Solve the equation x^2 - 8x + 5 = 0 by completing the square

x- 8x + 5 = 0 => (x- 8x + 16) - 11 = 0 =>(x - 4)2 = 11 =>x - 4 = +- sqrt(11) =>x = 4 +- sqrt(11)

DH

Related Maths GCSE answers

All answers ▸

How do I simplify a fraction with surds on the bottom when the surd is part of a function?


To make 12 cakes you need 100g of butter, 6 eggs, and 40g of sugar. How many cakes can you make with 450g of butter, 15 eggs, and 110g of sugar?


What is completing the square and how do you do it?


How do I differentiate?