Math calculator

Synthetic Division Calculator

Divide a polynomial by x − c using a compact coefficient recurrence. Its quotient and remainder sits beside the working formula for a quick arithmetic check.

Synthetic Division inputs

Set up the calculation

The reasoning underneath Synthetic Division

Preserve Dividend coefficients, highest power first when checking the Synthetic Division output. Keep Value c in divisor x − c under the same convention and estimate Quotient and remainder. A controlled change to Value c in divisor x − c should move the Synthetic Division Quotient and remainder in a mathematically consistent direction.

Working through Synthetic Division on paper

Bring down the first coefficient. Multiply it by c, add to the next coefficient, and repeat through the constant term.

Questions Synthetic Division can resolve

It quickly evaluates factors, tests proposed roots, and divides by monic linear expressions without writing every power of x.

Before accepting a Synthetic Division answer

The divisor must have form x−c with leading coefficient one. Preserve zero coefficients for missing powers.

Synthetic division brings down the leading coefficient, then repeatedly multiplies by c and adds the next coefficient. The final entry is the remainder. Synthetic Division also connects with general polynomial division.

Making sense of Synthetic Division

Reproducing Synthetic Division later

Polynomial long division handles broader divisors; synthetic division is a shortcut for one monic linear divisor. Here the requested quantity is specifically quotient and remainder.

Dividing x³−6x²+11x−6 by x−2 gives quotient x²−4x+3 and remainder zero. This Synthetic Division example can be compared with check P(c).

Testing Synthetic Division beyond the example

Substitute the Synthetic Division solution into Dividend coefficients, highest power first. This Synthetic Division check rejects false Synthetic Division branches and forbidden denominators.

Choose an easy Dividend coefficients, highest power first value before running Synthetic Division. Predict Value c in divisor x − c, then compare it with the Synthetic Division output.

Reverse the Synthetic Division reasoning once: begin with the shown Quotient and remainder and ask whether Dividend coefficients, highest power first could produce it under Value c in divisor x − c. When that Synthetic Division relationship fails, the contradiction narrows the error to an entry, order choice, or convention.

Questions about Synthetic Division

What does a zero remainder mean?

x−c is a factor.

Why include zero coefficients?

They preserve missing powers.

Can I divide by x+3?

Yes; enter c=−3.

What is the output degree?

One less than the dividend degree.