Guide

Scientific calculator

• Check, change or clear a stored variable before the next problem

  Find a variable's stored value, replace it or clear that variable without disturbing the others.

• Find the roots of a cubic equation

  Enter a cubic's four coefficients, read its roots, and check them by factorisation.

• How to solve a quadratic equation and find its extremum

  Enter three coefficients to find both the roots and the vertex of a quadratic function.

• How to solve a system of two equations

  Enter two rows of coefficients to find x and y for a pair of linear equations.

• Install CalcES on your phone for quick access

  Add CalcES to your Android or iPhone Home Screen so you can open the calculator in one tap.

• Make a table of values for a function

  Calculate a sequence of f(x) values over a chosen range without re-entering the expression.

• Recalculate one formula for different values with CALC

  Enter a formula once, then change its variable to obtain several results.

• Solve a quadratic inequality and read its solution set

  Enter the coefficients, choose the relation, and identify the intervals that satisfy it.

• Solve an equation directly in the calculator

  Enter a complete equation and let the calculator isolate x automatically, without opening a separate mode.

• Solve three linear equations in three unknowns

  Enter the coefficients of a three-equation system and verify x, y, and z.