Seudónimo Seudónimo

01-05-2017
Mathematics

contestada

can someone help with this question ??
fully factorise x^2+ 9x +18

Respuesta :

01-05-2017

This is of the form ax^2+bx+c, you must find two values, j and k, that satisfy two conditions:

jk=ac=18 and j+k=b=9, so j and k must be 3 and 6, and the factors then must be:

(x+3)(x+6)

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