SOLUTION: For which equation is it best to use the Factoring Method to solve this trinomial? A.) {{{ x^2 + 4x = -5 }}} B.) {{{ 3x^2 + 2.4x - 3 = 0 }}} C.) {{{ x^2

SOLUTION: For which equation is it best to use the Factoring Method to solve this trinomial? A.) {{{ x^2 + 4x = -5 }}} B.) {{{ 3x^2 + 2.4x - 3 = 0 }}} C.) {{{ x^2 - 4x + 3 = 0 }}

Question 1031991: For which equation is it best to use the Factoring Method to solve this trinomial?

A.)

B.)
C.)

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Clearly not B, because of the x^2 preceded by 3 (not a problem) but the middle term of 2.4.
A is prime, because if we complete the square, we have x^2+4x+4=-5+4, and that is (x+2)^2= -1, and x+2=+/- sqrt (-1)
C factors into (x-3)(x-1)=0. It is C.

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