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 ▸A graph of a linear equation passes through 2 points, (2,9) and (-3,-1). Find the equation of the line in the form y=mx+c.
3 shops sell TVs and all 3 are having sales. Here are the three original prices of the TVs and their discounts: X12: £150 (25%), Teli-vise: £235 (1/2 off), Xpert: £60 (with a year of weekly £8 payments). Which TV is the cheapest once discounted.
Simplify the following: 5(x+2) - 3(6-x)
The price of a pencil grows by 1%. What is the final crice if the initial price was £1?