SOLUTION: a)Solve {{{7x+x(x-3)=0}}} -What are the solutions? x=____ (Simplify your answer. Type exact answers, using radicals as needed. Express complex numbers in terms of i. Use a co

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: a)Solve {{{7x+x(x-3)=0}}} -What are the solutions? x=____ (Simplify your answer. Type exact answers, using radicals as needed. Express complex numbers in terms of i. Use a co      Log On


   

Question 394985: a)Solve 7x%2Bx%28x-3%29=0
-What are the solutions?
x=____
(Simplify your answer. Type exact answers, using radicals as needed. Express complex numbers in terms of i. Use a comma to separate answers as needed.)
b)Find the x-intercepts of f%28x%29=7x%2Bx%28x-3%29.
-What are the x-intercepts?
(Type an ordered pair. Simplify your answer. Type an exact answer, using radicals as needed. Express complex numbers in terms of i. Use a comma to separate answers as needed.}
Found 2 solutions by scott8148, ewatrrr:
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
distributing ___ 7x + x^2 - 3x = 0 ___ x^2 + 4x = 0

factoring ___ x(x + 4) = 0

x = 0

x + 4 = 0 ___ x = -4

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Solving for x

7x%2Bx%28x-3%29=0

   x^2 + 4x = 0

  x(x+4) = 0

  x = 0

 (x+4) = 0

  x = -4

x-intercepts:  When (f(x) = 0

0=7x%2Bx%28x-3%29   |found x values above

 Pt(0,0) and Pt(-4,0) are the x-intercepts