40.5k views
3 votes
Plz help me with this

Plz help me with this-example-1
User Raduken
by
8.5k points

2 Answers

2 votes

I’m pretty sure the answer is B.

User Fadid
by
8.5k points
3 votes

Answer:
\bold{b)\quad (-2\pm √(14))/(2)}

Explanation:


2x^2+4x-5=0\qquad \implies\qquad a=2,\ b=4,\ c=-5\\\\\text{The quadratic equation is not factorable so use the Quadratic Formula:}\\x=(-b\pm √(b^2-4ac))/(2a)\\\\\\x=(-4\pm √(4^2-4(2)(-5)))/(2(2))\\\\\\.\ =(-4\pm √(16+40))/(4)\\\\\\.\ =(-4\pm √(56))/(4)\\\\\\.\ =(-4\pm 2√(14))/(4)\\\\\\.\ =\large\boxed{(-2\pm √(14))/(2)}

User Diclophis
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories