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MATH TRICKS 4 U (ALGEBRA)

IT IS AN ATTEMPT TO PROVIDE A TOOL TO INCREASE MATH KNOWLEDGE FOR ALL COMPETITIVE EXAMS IN AN EFFECTIVE MANNER. HERE IS A BRILLIANT WAY TO LEARN MATH (ALL CHAPTERS)FOR  HIGH SCHOOL, SENIOR SECONDARY  SCHOOL AND COMPETITIVE EXAMS(SSC CGL,CPO AND BANK EXAMS ...) HAVE FUN!
  ALGEBRA




Now we have to solve this problem within seconds.
 
Trick:- 

N :- given number
N² ±2 ( if power is 2)

Sign trick:-
According to question
N = 3
Power is 2
Sign is  (+  ,  +)
Final sign will be  (-)

By applying above tricks
            (N² - 2)

3² -  2 = 9 - 2 = 7 Ans✓✓

Q2.



Sol:- By applying above tricks
          (N²±2)
         • N :- 4
         •Given sign is ( - ,+)
          •Final sign will be  (+)
          •(N² + 2)

          4² + 2 = 16 + 2 = 18 Ans✓✓





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