How do you solve #x( x - 6) = 391#?

1 Answer
Nghi N
Jul 20, 2017

(- 17) and 23

Explanation:

#f(x) = x^2 - 6x - 391 = 0#
Use the new Transforming Method (Google, Socratic Search):
The 2 roots have opposite signs.
Use calculator to compose factor pairs of (-391) --> (-17, 23).
This sum is (23 - 17 = 6 = -b). The 2 real roots are: -17 and 23.

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