The value of
is 
Further explanation:
Factors are the numbers that are multiplied together to obtain another number.
Perfect square is number that can be obtaining by squaring the number.
Explanation:
The given expression is 
The factors of
can be expressed as follows,

The factors of
can be expressed as follows,

Take a as
common factor from
and 
The value of
can be expressed as follows,

The value of a is 
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Answer details:
Grade: High school
Subject: Mathematics
Chapter: Number system
Keywords: expression, place value, base value, decimal expansion, whole number, natural number, division, multiplication, subtraction, solve the equation, solution, linear equation.