two equations help needed

blamocur

Full Member
Joined
Oct 30, 2021
Messages
586
But I thought I was supposed to isolate x or y in one equation then input that result into another and then oh
You did the right thing to reduce the system of two equations with two variables to a single equation with a single variable.
Now you need to solve the resulting quadratic equation.
 

BigBeachBanana

Full Member
Joined
Nov 19, 2021
Messages
538
Are you sure that 2/2 = 4? Maybe that's your 1, just look like a 4.
You could've also done it through the method of grouping.
[math]x^2-4x+3=0\\ (x^2-x)+(-3x+3)=0\\ x(x-1)-3(x-1)=0\\ (x-1)(x-3)=0 \implies x=1, x=3[/math]
 
Last edited:

R.M.

Junior Member
Joined
Aug 5, 2019
Messages
115
You could have also factored the quadratic: (x - 3)(x - 1) = 0. Saves a little calculating.
 

hajfajv

New member
Joined
Nov 13, 2019
Messages
9
Pretty sure sqrt(4) is 2, 6/2 = 3 and 2/2 = 1?
Oh yea my 1's 4's and 9's are not reading friendly :)

I'm terrible at factorizing quadratics and therefore tend to avoid it, so I need to work on that aspect.

I cannot remeber is seeing your grouping method, will look into that seems like a time saver.
 

lev888

Elite Member
Joined
Jan 16, 2018
Messages
2,677
Pretty sure sqrt(4) is 2, 6/2 = 3 and 2/2 = 1?
Oh yea my 1's 4's and 9's are not reading friendly :)

I'm terrible at factorizing quadratics and therefore tend to avoid it, so I need to work on that aspect.

I cannot remeber is seeing your grouping method, will look into that seems like a time saver.
If you are familiar quadratic equations, may I ask why you are having difficulties with the problem?
 
Top