Perspectives
SHIFT SOLVE vs Equation Mode: Why One Root Isn't All
On an fx-991ES PLUS-style sci cal, SHIFT SOLVE and a quadratic equation mode answer different questions. See a two-root example tested on CalcES and the limits Casio documents.
Reviews and perspectives
Scientific calculator reviews and digital math tool coverage for readers in the Philippines.
Featured story · Reviews & comparisons
8 Best Scientific Calculators Online for Casio Users
Compare eight online sci cals for fx-991ES PLUS and fx-570ES PLUS users: familiar-style keys first, then exact answers, worked steps and graphs.
