ตอบ:
# AB + B = 12, 65/8 #
คำอธิบาย:
# 10x ^ 2-x-24 = (Ax-8) (Bx + 3) #
# 10x ^ 2-x-24 = ABX ^ 2 + 3AX-8Bx-24 #
# 10x ^ 2-x-24 = ABX ^ 2- (8B-3A) x-24 #
# AB = 10 #
# 8B-3A = 1,:. 8B = 1 + 3A, B = (1 + 3A) / 8 #
# (A (1 + 3A)) / 8 = 10 #
# 3A ^ 2 + A-80 = 0 #
รุ่น A = (- 1 + -sqrt (1-4 (3) (- 80))) / 6 = (- 1 + -sqrt961) / 6 = (- 1 + -31) / 6 #
# A = 5, -16 / 3 #
# A = 5,:. B = 2,:. AB + B = 10 + 2 = 12 #
# A = -16 / 3,:. B = -15 / 8,:. AB + B = 10-15 / 8 = 65/8 #
