Solve the equation x^2 - 8x + 5 = 0 by completing the square
x2 - 8x + 5 = 0 => (x2 - 8x + 16) - 11 = 0 =>(x - 4)2 = 11 =>x - 4 = +- sqrt(11) =>x = 4 +- sqrt(11)
DH
Related Maths GCSE answers
All answers ▸Expand and simplify (x − 4)(2x + 3y)^2
ABC, DEF and PQRS are parallel lines. BEQ is a straight line. Angle ABE = 60° Angle QER = 80° Work out the size of the angle marked x. Give reasons for each stage of your working.
Solve the inequality 5x + 3 ≤ 3x − 6
z = 3x + 5y, if x = 7 and z = 41, what is 2y?