Inequality: 33371

Solve the quadratic inequality: -2x2 + 4x + 6 <0

Result

O : (Correct answer is: ) OK

Step-by-step explanation:

2x2 + 4x + 6 < 0 2x2  4x  6 > 0  2x24x6=0  2x24x6=0 2 ...  prime number 4=22 6=23 GCD(2,4,6)=2  x22x3=0  a=1;b=2;c=3 D=b24ac=2241(3)=16 D>0  x1,2=2ab±D=22±16 x1,2=22±4 x1,2=1±2 x1=3 x2=1  (x3)(x+1)>0  x>3  x > 1 x<3  x < 1  x>3    x < 1  O=R  <1; 3 >

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