Polynomial Division Practice

Skill: polynomial-division

Polynomial Division Practice

Expand special products instantly, divide by long division and synthetic division, and use the Remainder Theorem. Fresh numbers every round.

1 Practice

Type your answer and press Check answer (or Enter). A wrong answer earns a hint first; a second miss earns another hint; a third miss walks you through the full solution.

Score 0 · Streak 0 · Problem 0
Score counts first-try correct answers. Streak counts consecutive correct answers.
Problem

2 What you’ll practice

Every problem is generated fresh from templates across several question types — a problem never repeats until its whole pool is used up.

Square a binomial

(x + a)² and (x − a)² from the pattern.

(x + 5)² → x² + 10x + 25

Difference of squares

(x + a)(x − a) with no middle term.

(x + 4)(x − 4) → x² − 16

Name the pattern

Perfect square or difference of squares?

(x − 9)² → perfect square

Long division

Divide leading terms, multiply back, subtract.

(x³+2x²−5x−6) ÷ (x+1)

Synthetic division

The fast lane for x − r divisors.

(2x³−3x²+4x−5) ÷ (x−2)

Remainder Theorem

The remainder is just f(r).

f(x) ÷ (x − 2) → compute f(2)

3 Watch out for these

The three mistakes students make most often on these problems.

Forgetting 2ab

(x + 5)² = x² + 25 misses the 10x. The pattern is a² + 2ab + b².

Sign errors when subtracting

In long division, subtracting the partial product flips every sign.

Dropping the remainder

A division answer is quotient AND remainder — R = 0 is the factor test.

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