Respuesta :

barakaodoyo5

Answer:

(z-9)(z+2)

Step-by-step explanation:

U have to find numbers which when u multiply u get -18 and subtract u get -7

-18= -9×+2,2-9=-7

Z²+2z-9z-18

Z(z+2)-9(z+2)

(Z-9)(z+2)

nermay7

Answer: (z+2)(z-9)

Step-by-step explanation:

[tex]z^{2} -7z-18[/tex]  to solve for this you need to find two numbers that if multiplied together they give you negative 18 and at the same time adds up to -7.

Those two numbers could be  -9 and 2 .

now rewrite the expression like this.

[tex]z^{2} +2z - 9z -18[/tex]   Group them  

([tex]( z^{2} +2z) ( -9z- 18)[/tex]    Factor it out z in the first grouping

z(z +2)  -9(z + 2)          factor out  x+2

(z +2 ) (z-9)

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