Quadratic equation

Find the roots of the quadratic equation: 3x2-4x + (-4) = 0.

Correct answer:

x1 =  2
x2 =  -0.6667

Step-by-step explanation:

3x24x+(4)=0  3x24x4=0  a=3;b=4;c=4 D=b24ac=4243(4)=64 D>0  x1,2=2ab±D=64±64 x1,2=64±8 x1,2=0.66666667±1.3333333333333 x1=2 x2=0.66666666666667   Factored form of the equation:  3(x2)(x+0.66666666666667)=0 x1=2

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