Factorise x^2+3x+4 without the use of quadratic formula

We use the form ax^2+bx+cTo factorise we need to put the equation into 2 bracketsThese 2 brackets will be in the form (x+k)(x+j) where k and j are to be foundWe need to find a combination of k and j for which k+j=b and k*j=c
For this example:(x+1)(x+2)

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Answered by William C. Maths tutor

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