Current location - Training Enrollment Network - Mathematics courses - There is a problem in senior one mathematics to find at least one element in A, and the answer to the problem is △=9-8a = 0. What does △ mean?
There is a problem in senior one mathematics to find at least one element in A, and the answer to the problem is △=9-8a = 0. What does △ mean?
The general formula of binary function is AX*X+BX+C=0(X unknown).
△=B*B-4AC is a judging formula for judging whether there is a solution.
When △ = b * b-4ac >; 0 means that there are two unequal solutions.