odpoveď: #Delta = -172 # vysvetlenie: # 9x ^ 2 + 2 = 10x "" larr # aby sa to rovnalo #0# # 9x ^ 2 -10x + 2 = 0 "" rarr a = 9, "" b = -10, "" c = 2 # #Delta = b ^ 2 -4ac # #= -(-10)^2-4(9)(2)# #=-100-72# #=-172#