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 ▸Solve the simultaneous equations: 3x-y=13, 2x+y=12
The point P has coordinates (3, 4) The point Q has coordinates (a, b) A line perpendicular to PQ is given by the equation 3x + 2y = 7 Find an expression for b in terms of a
A right-angled triangle has base 7cm and height 6cm. Find it's area.
Solve the quadratic equation x^2 + x - 20 = 0