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

1 Answer
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.