Topic Details (Notes format)

How to Use Remainder Theorems (Polynomial Division)

Subject: Mathematics

Book: Maths Mastery

The Remainder Theorem states that the remainder when a polynomial f(x) is divided by (x – a) is simply f(a). For example, if you want the remainder when x² – 5x + 6 is divided by (x – 3), evaluate f(3) = 3² – 5×3 + 6 = 9 – 15 + 6 = 0. The Factor Theorem extends this, indicating if f(a) = 0, then (x – a) is a factor of the polynomial. These shortcuts alleviate long division and facilitate polynomial factoring, essential in solving polynomial equations, analyzing algebraic structures, and simplifying advanced math problems with speed and precision.

Practice Questions

If the radius of a circle is 7 cm, what is its circumference?

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If the sum of the angles of a polygon is 1080°, how many sides does the polygon have?

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A number is increased by 20% and then decreased by 10%. What is the net change?

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What is the area of an equilateral triangle with side length 10 cm?

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What is the square root of 0.25?

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If a number is divisible by 9, it is also divisible by which of the following?

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If x^3 - 3x^2 + 4 = 0, what is one root of the equation?

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What is the value of log₃(27)?

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If a = 5 and b = 12, what is the length of the hypotenuse of a right triangle?

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What is the cube of 4?

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