Question

18. Which is an example of a formula?
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Answer 1

Answer:

CO² , O² , NAcl...........

Answer 2

Formulas :    

I have thousands but here I am only revealing 4 formulas which will always help you in your real life :    

1)  

(a+b)^2= a^2 + 2ab + b^2

2)

(a-b)^2=a^2-2ab+b^2

3)

Perimeter of all shapes is the sum of all sides

4)

Square of any two-digit number

32^2

=_ _ _

1st dash: First 2 square= 4

2nd dash: All numbers multiplied = 3 x 2 x 2 =12 but write only 2 the last digit.  (1 carry)

3rd dash: Last we write 3 square = 9 + 1 (carried)

=10 so the square is

1024(answer)