Math Portal

Math Portal combines procedure-specific calculators with lessons and formulas. Its synthetic-division tool divides polynomials by binomials and can find a remainder or test whether the divisor is a factor, with a table and explanation for each step. A published solved example divides x²+7x+10 by x+5 to obtain x+2 with zero remainder, showing how the divisor's zero enters the table. Other calculators cover polynomial roots, graphing and rational expressions. Paid homework help is a separate service; the calculator catalogue does not define its terms.