Solve 3

Solve a quadratic equation:

(6n+1) (4n-1) = 3n2

Correct answer:

n1 =  0.271
n2 =  -0.1757

Step-by-step explanation:

(6n+1)(4n1)=3n2  21n22n1=0  a=21;b=2;c=1 D=b24ac=22421(1)=88 D>0  n1,2=2ab±D=422±88=422±222 n1,2=0.047619±0.223353 n1=0.270972179 n2=0.175734084  n1=0.271

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