Question

I need help on a few questions that I am stuck on I will be putting down what I think it is but I am not 100% sure.
#1 What method is the most efficient to use to solve
X^2+4x+3=0
A: Factoring
B: Isolating the X^2 term and finding the square root of both sides.
C: Using the Quadratic Formula
D: All three methods would be efficient.
I say C

#2 What method is the most efficient to use to solve
X^2+5x-6=0
A: Factoring
B: Isolating the X^2 term and finding the square root of both sides.
C: Using the quadratic formula
D: All three methods would be efficient
I say D

Answer 1

Here are the other 2 questions.
#3 Which method is the most efficient to use to solve
X^2-7=0
A: factoring
B:Isolating the X^2 term and finding the square root of both sides.
C: Using the quadratic formula.
D: All three methods would be efficient.
I say A

#4 Lisa is planning to build a rectangular deck that is 10 feet longer than it is wide. Which equation would Lisa use to determine the width of the deck when the area is 375 square feet.
A: 10w^2=375
B: w^2+10w=375
C: W+10w=375
D: W^2-10w=375
im not sure which one it is sorry.