how would I factor this problem using the AC method 8x^2+20x+30

x^2+20x+30*(8)

x^2+20x+240

[x+10+2i*sqrt(35)]*[x+10-2i*sqrt(35)]

[8x+10+2i*sqrt(35)]*[8x+10-2i*sqrt(35)]

2[4x+5+i*sqrt(35)]*[8x+10-2i*sqrt(35)]

dividing by 8,

(1/4)*[4x+5+i*sqrt(35)]*[8x+10-2i*sqrt(35)]

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