Report - km.streesp.ac.thkm.streesp.ac.th/files/140514099443085_19060821211117.pdfH 1'2y2 — 4x2 + 7'2y + 16x + 44 0 12y2 — 4x2 + 7'2y + 16x + 44 (4x2 — 16x) (12y2 + — 12(y2 + 6y) —

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