√ √ √ a= 5 b2 - 4ac + b= 6 = c= -8 √ √ √ a= 1 b2 - 4ac + b= 8 = c= 15 √ √ √ a= 1 b2 - 4ac + b= 5 = c= -14 √ √ √ a= 3 b2 - 4ac + b= 13 = c= 4 √ √ √ a= 1 b2 - 4ac + b= -5 = c= 4 √ √ √ a= 6 b2 - 4ac + b= 1 = c= -5 √ √ √ a= 1 b2 - 4ac + b= -3 = c= -10 √ √ √ a= 7 b2 - 4ac + b= 9 = c= 2 √ √ √ a= 5 b2 - 4ac + b= 10 = c= -2 nearest 10th √ √ √ a= 3 b2 - 4ac + b= 10 = c= 5 nearest 10th |