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Sagot :
Answer:
7(1+3)
Step-by-step explanation:
if you expand the brackets you are doing 1x7 + 3x7 = 7+21
The expression shows 7 + 21 written as a product of two factors is 7(1+3).
What is Distributive property?
The distributive property of multiplication is that when two numbers are added such as (a+b) and multiplied by a third number such as x, then the result will be the sum of the multiplication of the third number with the first number (xa) and the third number with the second number (xb).
x(a+b) = xa + xb,
The expression 7+21 using the distributive property can be written as,
[tex]7+21\\\\\text{Taking 7 as the common form both the terms}\\\\= 7 (1+3)[/tex]
Hence, the expression shows 7 + 21 written as a product of two factors is 7(1+3).
Learn more about Distributive property:
https://brainly.com/question/13130806
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