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Finding the variable (a) the unit digit of the equation (a+2)² is: 1
Information about the problem:
To solve this problem, we have state de equations and find the positive integer that satisfies them:
Equation 1:
Finding a number that when square resulted in a value ended in 9, the options are:
7² = 49
3²= 9
Options for 1est equation: 7 or 3
Equation 2:
Finding a number that when summed with 1 and square resulted in a value ended in 4. Evaluating the 1est equation options, we have:
(7+1)² = unit digit 4
8² = unit digit 4
64 = unit digit 4 (correct)
(3+1)² = unit digit 4
4² = unit digit 4
16 = unit digit 4 (incorrect)
The value (a) that satisfied both equation is = 7
Substituting the value (a) in the equation (a+2)² the units digit is:
a = 7
(a+2)² =
(7+2)²
9² =
81=
Unit digit = 1
An equation is the equality between two algebraic expressions, which have at least one unknown or variable.
Learn more about equation at: brainly.com/question/2972832 and brainly.com/question/27815607
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