How do you solve #7x^2 - 7x - 2x + 2 = 0#?

1 Answer
Nghi N.
Apr 8, 2016

#1 and 2/7#

Explanation:

#y = 7x^2 - 9x + 2 = 0.#
Since (a + b + c = 0), use shortcut. The 2 real roots are: 1 and
#c/a = 2/7,#

Reminder of Shortcut.

  • When a + b + c = 0 --> the 2 real roots are: 1 and (c/a)
  • When a - b + c = 0 --> the 2 real roots are: -1 and (- c/a)

Try to remember this Shortcut. It will save you a lot of time and effort.

Related questions
See all questions in Comparing Methods for Solving Quadratics
Impact of this question
1164 views around the world
You can reuse this answer
Creative Commons License