Topic Details (Notes format)

How to Factor the Sum or Difference of Cubes

Subject: Mathematics

Book: Maths Mastery

Sum of cubes a³ + b³ factors into (a + b)(a² – ab + b²), while difference of cubes a³ – b³ factors into (a – b)(a² + ab + b²). For instance, x³ – 8 = (x – 2)(x² + 2x + 4). These patterns appear frequently in polynomial algebra and advanced factorization tasks. You’ll see them in integral calculus (factoring integrands), economic models (cubic cost functions), and more. Knowing how to handle sums/differences of cubes fosters swift resolution of higher-order polynomial problems.

Practice Questions

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

View Question

If the length of a rectangle is doubled and the width is halved, what is the change in area?

View Question

The sum of the reciprocals of two numbers is 1/4. If one number is 12, what is the other?

View Question

The area of an equilateral triangle with side length 6 cm is:

View Question

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

View Question

If 2a + b = 10 and a - b = 4, what is the value of a?

View Question

If 2x = 16, what is the value of x?

View Question

The sum of the squares of two consecutive integers is 145. What are the integers?

View Question

What is the cube root of 729?

View Question

If sin(θ) = 3/5 and θ is an acute angle, what is tan(θ)?

View Question