Why no multiply symbol in algebraic expresisons?

Transcript

Why no multiply symbol in algebraic expressions?The rule is simple: when multiplying a number and a letter-number (variable), you can omit the × symbol For example: While writing 2 × n, we can just write 2n Or if we want to write 5 × m + 3, we just write it as 5m + 3 Important things to note: Number First: When you omit the multiplication sign, the number (called the coefficient) is always written before the letter. 4 × n becomes 4n. You would not write it as n4. Between Two Letters: The multiplication symbol can also be omitted between two letters. For example, a × b can be written as ab. When NOT to Omit: You cannot omit the multiplication symbol between two numbers. For obvious reasons, 4 × 29 cannot be written as 429. The first means 116, while the second is the number four hundred twenty-nine. By making expressions like 4 × n into 4n and l + l into 2l, algebra becomes a much neater and more efficient way to express mathematical relationships.