Can someone please show me step by step how to solve this Absolute Value Equation?
| 5x + 7 | = 3

Question

Can someone please show me step by step how to solve this Absolute Value Equation?
| 5x + 7 | = 3

anonymous · Answer

Square both sides?
(5x+7)^2=3^2
25x^2+49+2(5x)(7)=9

anonymous · Answer

25x^2+70x+40=0

anonymous · Answer

5x^2+35x+8=0

anonymous · Answer

ohhh I don't think it works

anonymous · Answer

nless you try the formula

anonymous · Answer

What formula is that?

anonymous · Answer

x=-b

anonymous · Answer

sorry not thAat :D

anonymous · Answer

lol ... I'm confused but it's ok

anonymous · Answer

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQOf9AbwGTjvD8LPiq2A0-x2wlR-yFEKiLFhxTfyd7M1hMWAI8OFw

anonymous · Answer

if you fill the quadratic equatioin into that it should work out?

anonymous · Answer

$$\frac{ -7\pm \sqrt{7^{2}- (4)(5)(3)} }{ 2a }$$

like that?

texaschic101 · Answer

| 5x + 7 | = 3

(5x + 7) = 3        and    -(5x + 7) = 3
5x = 3 - 7                     -5x - 7 = 3
5x = -4                         -5x = 3 + 7
x = -4/5                        -5x = 10
                                       x = -5

x = -4/5 and x = -5

texaschic101 · Answer

this should help.. http://www.purplemath.com/modules/solveabs.htm

anonymous · Answer

Thank you both... I appreciate your assistance. c:

texaschic101 · Answer

anytime :)

anonymous · Answer

Sorry I confused you!

anonymous · Answer

@yaysocks  Noooo it's ok thank you for attempting. T: