When the expression has no constants, the highest common factor (HCF) of the coefficients is found. The expression has no constants. The HCF of the coefficients is the greatest factor that is common ...

Algebraic expressions can be simplified by collecting like terms. Positive like terms are often written before the negative like terms. When grouping the like terms together, the order does not matter ...

Expressions like the following are called polynomials in one variable. 0, -5, 7 etc. are examples of constant polynomials. The constant polynomial 0 is also the zero polynomial. Others like 7x + 9 is ...