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√(2x+3) - √(x+1) = 1

I know the answers are that x= -1, and 3, but I don't know how tf you get 3 because I only get -1. Pls help lol 💀
Locked · 22-25, F Best Comment
SW-User
@Locked Yeah, I got out of bed and tried to find a notebook to explain it in. 😂 Now I'm going to bed for real. Just spent two minutes doing a random maths problem when I don't even do my own homework.
luvisrage · 26-30, F
@SW-User You can do my homework anytime lmao 😂
SW-User
@luvisrage I think there's an app a friend of mine uses. It's apparently pretty good with algebra, radical equations, stuff like that. You scan the problem and it explains it. Photo math or something along those lines. Might be helpful 😁

Pseudonym · 26-30, M
Well, I turned up late to the party it seems. Locked had your back though, good man*. If you want to get better at this kind of stuff (for fun I might add 😁...), download Brilliant. It's an awesome problem solving platform. I use it almost everyday!

Edit: *or lady!
luvisrage · 26-30, F
I'm screwed ☠️
@luvisrage why don't you try putting random number? Maybe you can get the answer 😅
Dan193 · 31-35, M
@Dan193 I tried and messed up somewhere, because I got a ridiculous results 😣
luvisrage · 26-30, F
@Dan193 Yeah, math is hard
Faust76 · 46-50, M
Yeah, responding to these in text is like, impossible :p
However, you can just enter that on Wolfram Alpha, and click on step-by-stem solution. Probably shouldn't tell that, because it's cheating, you really ought to learn how and why to do it yourself ;)
luvisrage · 26-30, F
@Faust76 I am learning how to do it myself, I'm studying for an exam tomorrow.
sometimeslonelytoo · 51-55, M
I agree with Prisoner619: square both sides, simplify, rewrite in the normal quadratic form ax^2+bx+c=0 and solve accordingly.
sometimeslonelytoo · 51-55, M
@luvisrage It should factorise to (x+1)(x-3)=0, right?
luvisrage · 26-30, F
@sometimeslonelytoo I simplify it to 2x+3 = x+2 and then solve algebraically and get -1.
sometimeslonelytoo · 51-55, M
@luvisrage Looks like you did the squaring incorrectly. Try again, step by step. If you're not careful you lose one solution, which is exactly what's happened.
Prisoner619 · 26-30, M
You square on both sides twice resulting in a quadratic equation with two solutions.

Sorry I cannot explain this on paper now
Dan193 · 31-35, M
damn I thought I was good at math x.x I don't remember heck.
Sorry i failed my math
Tastyfrzz · 61-69, M
Substitute in 3, Sqrt (9)=3, sqrt(4)=2, 3-2=1
Goralski · 56-60, M

 
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