Question

Factorise the following trinomials. 2a +9a +7​

Answer 1

Answer:

2a+9a+7=0

Step-by-step explanation:

The first term is,  2a2  its coefficient is  2 .

The middle term is,  -9a  its coefficient is  -9 .

The last term, "the constant", is  -7  

Step-1 : Multiply the coefficient of the first term by the constant   2 • -7 = -14  

Step-2 : Find two factors of  -14  whose sum equals the coefficient of the middle term, which is   -9 .

     -14    +    1    =    -13  

     -7    +    2    =    -5  

     -2    +    7    =    5  

     -1    +    14    =    13