Complete the square of the following expression: 2x^2 -8x+21

2(x-2)^2 +13

Answered by Iliya F. Maths tutor

2527 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the following equation by factorisation: x^2 - 2x -15 = 0


Solve the inequality 5x^2 + x - 3 = 1


There are only 7 blue pens, 4 green pens and 6 red pens in a box. One pen is taken at random from the box. Write down the probability that this pen is blue.


A pen is the shape of an equilateral triangle. A goat is attached to a corner of the pen on a rope. The goat eats all the grass it can reach. It can just reach the opposite fence of the pen. What percentage of the grass in the pen does the goat eat?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences