إجابة:
# م = -2 #
# م = -7.5 #
تفسير:
معطى-
# (2M + 3) + 12 / (2M + 3) + 13 = 0 #
اضرب كلا الجانبين مع
# (2M + 3) (2M + 3) + 12 / (2M + 3) (2M + 3) + 13 (2M + 3) = 0 (2M + 3) #
# (2M + 3) (2M + 3) + 12 / إلغاء (2M + 3) إلغاء (2M + 3) + 13 (2M + 3) = 0 (2M + 3) #
# 4M ^ 2 + 12M + 9 + 12 + 26M + 39 = 0 #
# 4M ^ 2 + 38m + 60 = 0 #
# د = - ب + -sqrt (ب ^ 2-4ac) / (2A) #
# د = - 38 + -sqrt (38 ^ 2- (4xx4xx60)) / (2xx4) #
# د = - 38 + -sqrt (1444-960) / 8 #
#m = - 38 + -sqrt (484) / 8 = -38 + -22 / 8 #
# د = (- 38 + 22) / 8 = (- 16) / 8 = -2 #
# د = (- 38-22) / 8 = (- 60) /8=-7.5#