Examples with solutions for Multiplication of Powers: Combination of different bases

Exercise #1

Reduce the following equation:

a5×a8×x3= a^{-5}\times a^8\times x^3=

Video Solution

Step-by-Step Solution

To simplify the given mathematical expression, we'll follow these steps:

  • Step 1: Apply the Product of Powers Property to terms with the same base. For the expression a5×a8a^{-5} \times a^8, we use the rule:
  • am×an=am+na^m \times a^n = a^{m+n}.
  • Step 2: Add the exponents: 5+8=3-5 + 8 = 3. Therefore, a5×a8=a3a^{-5} \times a^8 = a^3.
  • Step 3: Since x3x^3 does not share the base aa, it remains as is in the expression.

Therefore, the simplified form of the expression a5×a8×x3 a^{-5} \times a^8 \times x^3 is:

a3×x3a^3 \times x^3

Answer

a3×x3 a^3\times x^3

Exercise #2

Reduce the following equation:

62×63×32= 6^2\times6^3\times3^2=

Video Solution

Step-by-Step Solution

To simplify the expression 62×63×32 6^2 \times 6^3 \times 3^2 , we will apply the rules for exponents:

  • Step 1: Identify powers with the same base. Here, we notice that 62 6^2 and 63 6^3 are powers with the base 6.
  • Step 2: Use the rule am×an=am+n a^m \times a^n = a^{m+n} to combine these powers: 62×63=62+3=65 6^2 \times 6^3 = 6^{2+3} = 6^5 .
  • Step 3: The term 32 3^2 remains unaffected by this operation because its base differs from that of 6. Therefore, it stays as 32 3^2 .

Therefore, the simplified form of 62×63×32 6^2 \times 6^3 \times 3^2 is 65×32 6^5 \times 3^2 .

Answer

65×32 6^5\times3^2

Exercise #3

Reduce the following equation:

23×38×39×26= 2^3\times3^8\times3^9\times2^6=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify terms with the same base.
  • Step 2: Apply exponent rules to combine terms with the same base.
  • Step 3: Rewrite the expression in its simplified form.

Now, let's work through each step:
Step 1: Identify terms with the same base:
The original expression 23×38×39×26 2^3 \times 3^8 \times 3^9 \times 2^6 contains two bases: 2 and 3.

Step 2: Apply exponent rules:
For base 2: 23×26=23+6=29 2^3 \times 2^6 = 2^{3+6} = 2^9 .
For base 3: 38×39=38+9=317 3^8 \times 3^9 = 3^{8+9} = 3^{17} .

Step 3: Rewrite the expression in simplified form:
The expression simplifies to 29×317 2^9 \times 3^{17} .

Therefore, the solution to the problem is 29×317 2^9 \times 3^{17} . Thus, choice 4 is correct.

Answer

29×317 2^9\times3^{17}

Exercise #4

Reduce the following equation:

a3×y7×a4×y5= a^{-3}\times y^7\times a^{-4}\times y^{-5}=

Video Solution

Step-by-Step Solution

To simplify the given expression a3×y7×a4×y5 a^{-3} \times y^7 \times a^{-4} \times y^{-5} , we will apply the exponent rules.

First, let's handle the terms involving the base a a :

a3×a4 a^{-3} \times a^{-4}

According to the rule xm×xn=xm+n x^m \times x^n = x^{m+n} , we add the exponents:

a3×a4=a3+(4)=a7 a^{-3} \times a^{-4} = a^{-3 + (-4)} = a^{-7}

Next, consider the terms involving the base y y :

y7×y5 y^7 \times y^{-5}

Using the same exponent rule:

y7×y5=y7+(5)=y2 y^7 \times y^{-5} = y^{7 + (-5)} = y^2

The entire expression now becomes:

a7×y2 a^{-7} \times y^2

Thus, the simplified form of the given expression is a7×y2 a^{-7} \times y^2 .

Answer

a7×y2 a^{-7}\times y^2