Question

x^2 - 20x + 112

solve it ​

Answer 1

x=(20+sqrt(-48))/2=10+2isqrt(3)=10.0000+3.4641i

1.1     Factoring  x2-20x+112 

The first term is,  x2  its coefficient is  1 .

The middle term is,  -20x  its coefficient is  -20 .

The last term, "the constant", is  +112 

Step-1 : Multiply the coefficient of the first term by the constant   1 • 112 = 112 

Step-2 : Find two factors of  112  whose sum equals the coefficient of the middle term, which is   -20 .

     -112   +   -1   =   -113     -56   +   -2   =   -58     -28   +   -4   =   -32     -16   +   -7   =   -23     -14   +   -8   =   -22     -8   +   -14   =   -22

For tidiness, printing of 14 lines which failed to find two such factors, was suppressed