what is the solution set of 7x^2+3x=0
Mathematics
ukalecia
Question
what is the solution set of 7x^2+3x=0
2 Answer

1. User Answers hartnn
take the common 'x' out,
7x^2 +3x = 0
x (7x+3) = 0
so x = 0 or 7x+3 = 0
x=0 or 7x = 3
x=0 or x = 3/7
so the solutions are 0,3/7. 
2. User Answers EamonnAdams1992
Answer:
x = 0 or x = 3/7
Stepbystep explanation:
The equation is a second order polynnomial and would therefore have two solutions for x.
The solution of the set can be expressed as:
[tex]=7*x^2+3*x=0[/tex]
The x is a common term in the expression so we can write is as:
[tex]=x*(7*x+3)=0[/tex]
Where the expression is equal to zero the first solution of x is 0: x=0
The second part (7x+3) is also equal to zero and therefore:
[tex]7*x+3=0[/tex]
After simplification x = 3/7
The solution of the set is x=0 or x=3/7
Substituting either in the left hand side of the equation will make the whole equation equal to zero.