Question

Which of the following is the correct substitution into the quadratic formula?
3x2 + 4x +5=0

Answer 1

The last choice is correct.

Explanation:

Use only the coefficients and the constant, a, b & c. not the variable x.

Answer 2

answer is D

x = -4±√4^2 - 4(3)(5)

2(3)

Explanation:

ax^2 + bx + c = 0

3x^2 + 4x + 5 = 0

x = -b ±√b^2 - 4ac

2(a)

x = -4±√4^2 - 4(3)(5)

2(3)