Answer:
(0,-7/5)
Step-by-step explanation:
2x^2+8x=x-3x^2
2x^2+3x^2=x-8x
5x^2=-7x
5x^2+7x=0
x(5x+7)=0
x=0 or x=-7/5
solution set is (0,-7/5)
x=0,x=-1.4
[tex]2 {x}^{2} + 8x - x + 3 {x}^{2} = 0 \\ 5 {x}^{2} + 7x = 0 \\ x(5x + 7) = 0 \\ x = 0 \\ \\ 5x + 7 = 0 \\ x = - \frac{7}{5} = -\frac{140}{100} = -1.4[/tex]
