Solve the cubic equation using factoring and the quadratic formula.
-Only one of the following equations is set up so that the values of a, b, and c can be determined immediately. Which one is it?
A) $( 3 x + 5 ) ^ { 2 } = 1$
B) $( 3 x + 5 ) ( x + 1 ) = 0$
C) $3 x ^ { 2 } + 5 x + 1 = 0$
D) $x ^ { 2 } + x = 1$

Question

Solve the cubic equation using factoring and the quadratic formula.
-Only one of the following equations is set up so that the values of a, b, and c can be determined immediately. Which one is it? 
A) $( 3 x + 5 ) ^ { 2 } = 1$
B) $( 3 x + 5 ) ( x + 1 ) = 0$
C) $3 x ^ { 2 } + 5 x + 1 = 0$
D) $x ^ { 2 } + x = 1$

Quizplus · Accepted Answer

Option C is already in the standard form of a quadratic equation, $ax^2 + bx + c = 0$, which allows for the immediate identification of a, b, and c values necessary to apply the quadratic formula.

Solve the Cubic Equation Using Factoring and the Quadratic Formula (3x+5)2=1( 3 x + 5 ) ^ { 2 } = 1(3x+5)2=1

Solve the Cubic Equation Using Factoring and the Quadratic Formula $( 3 x + 5 ) ^ { 2 } = 1$