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.

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