Quijanomicah738go Quijanomicah738go Mathematics Answered Below are different equations, determine whether each equation is quadratic or not quadratic. Write your answer on the space provided. 1x-5x+3=0 2.2s + 3t = -7 3,8k-3 = 12 4,9²-25=0 5.4m² + 4m + 1 = 0