A FOUR-STEP BLOCK HYBRID BACKWARD DIFFERENTIATION FORMULAE FOR THE SOLUTION OF GENERAL SECOND ORDER ORDINARY DIFFERENTIAL EQUATION. FJS [Internet]. 2025 Apr. 30 [cited 2025 Sep. 2];9(4):239-44. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/3338