Question

x²-3x-9=0 answer de do yaat​

Answer 1

Answer:

Step-by-step explanation:

 Factoring  x2-3x-9  

The first term is,  x2  its coefficient is  1 .

The middle term is,  -3x  its coefficient is  -3 .

The last term, "the constant", is  -9  

Step-1 : Multiply the coefficient of the first term by the constant   1 • -9 = -9  

Step-2 : Find two factors of  -9  whose sum equals the coefficient of the middle term, which is   -3 .

     -9    +    1    =    -8  

     -3    +    3    =    0  

     -1    +    9    =    8