Question

May someone please help? I have a D in math and need to bring it up!!

Answer 1

Answer:

x=+7, x=-7

Step-by-step explanation:

3x^2=131+16

3x^2=147

x^2=147/3

x^2=49

x=$\sqrt{49}$

x=+7

x=-7

Answer 2

Answer:

A. -7

Step-by-step explanation:

You want x by itself, so first, add 16 on both sides to get 3x^2=147. Next, divide by 3 on both sides to get x^2=49.  You're left with -7 and 7 as possible answers since both squared can equal 49. The smallest answer would be -7 in this situation.