Question

Facetorise -y^2-2y+4 by mid term split method

Answer 1

Step-by-step explanation:

-y^2 - 2y + 4  = 0.

 -1 • (y^2 + 2y - 4) = 0.

 (y^2 + 2y - 4) = 0.

Factoring  y2 + 2y - 4 

The first term is,  y2  its coefficient is  1 .

The middle term is,  +2y  its coefficient is  2 .

The last term, "the constant", is  -4 

Step-1 : Multiply the coefficient of the first term by the constant   1 • -4 = -4 

Step-2 : Find two factors of  -4  whose sum equals the coefficient of the middle term, which is   2 .

     -4   +   1   =   -3

     -2   +   2   =   0

     -1   +   4   =   3

Observation : No two such factors can be found !! 

Conclusion : Trinomial can not be factored.

better you solve it by using quadratic formula