(2-x)²-4(3x+1)²=0
4-4x+x²-4(9x²+6x+1)=0
4-4x+x²-36x²-24x-4=0
-35x²-28x=0
35x²+28x=0
x(35x+28)=0
x₁=0
35x+28=0
35x= - 28
x= - 28/35
x= - 4/5
x= - 0,8
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(2-x)²-4(3x+1)²=0
4-4x+x²-4(9x²+6x+1)=0
4-4x+x²-36x²-24x-4=0
-35x²-28x=0
35x²+28x=0
x(35x+28)=0
x₁=0
35x+28=0
35x= - 28
x= - 28/35
x= - 4/5
x= - 0,8