Several conventions are used to indicate multiplication.
Several conventions are used to indicate multiplication.
*For simple numbers, the symbol used looks much like the letter "X", as in the examples above.
*For simple numbers, the symbol used looks much like the letter "X", as in the examples above.
−
*Since the "X" looks like a letter, and letters are commonly used in algebra to indicate unknowns, or variables, the "dot" is frequently used: A * B = B * A.
+
*Since the "X" looks like a letter, and letters are commonly used in algebra to indicate unknowns, or variables, the "dot" is frequently used: A • B = B • A.
*Also, in algebraic use, quantities are simply juxtaposed to indicate that they are to be multiplied: Y = 3aX + 4bZ.
*Also, in algebraic use, quantities are simply juxtaposed to indicate that they are to be multiplied: Y = 3aX + 4bZ.