Answer:
<em>Answer</em><em> </em><em>is</em><em> </em><em>given below with explanations</em><em>. </em>
Step-by-step explanation:
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The first one seems more reasonable
Is 20 a perfect square number? A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 20 is about 4.472. Thus, the square root of 20 is not an integer, and therefore 20 is not a square number.
A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 21 is about 4.583. Thus, the square root of 21 is not an integer, and therefore 21 is not a square number.
Therefore neither one is a perfect square.
First you would do 5-2.
That would give you 3(x-1)=12
Next, 3 would be distributed into x-1
That would give you 3x-3=12
After that, you add 3 on both sides of the equal sign.
That would give you 3x=15
Finally, divide 3 on both sides and your final answer is:
x=5
If you do a Check, 12 will equal 12.
Hope this helps!!!
