Triple a is: 3a
Then multiply this by b is: 3ab
Multiply signs (×) are not written in algebra as they look too much like the letter x and confusion could arise; instead when two items are written next to each other (number next to a letter, or letter next to letter), multiplication of those two items is assumed.
So "3ab" means "3 times a times b".
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The expression that represents the product of 84 and b is 84b. In mathematical terms, when you multiply a number by a variable, you simply write the number next to the variable without any operation symbol in between. So, 84 multiplied by b is written as 84b.
The answer is b+1. Therefore the algebraic expression for this is b+1
When you multiply 4x² by 4x², you multiply the coefficients (4 * 4 = 16) and add the exponents of the variables (x² * x² = x^(2+2) = x⁴). Therefore, the result is 16x⁴.
(B - A)2 - 81 or (B - A + 9)(B - A - 9) If the starting point, A, is taken as zero the the expression simplifies to (B + 9)(B - 9)
The expression is: 57+b