factorisation:12m²-27
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Hello Dear Brainly user...
Question
is to factorise 12m² -27
Solution :-
we know that :
a² - b² = (a+b)(a-b)
By Frist method :-
=> 12m² - 27 = 0
=> 12m² = 27
=> m² = 27/12
=> m² = 9/4
=> m² = (3/2)²
=> m = ± 3/2 Answer
By 2nd Method
=> 12m² - 27 = 0
=> 3(4m² - 9) = 0
=> 4m² - 9 = 0
=> (2m)² - 3² = 0
=> (2m -3)(2m+3) = 0
=> 2m - 3 = 0 & 2m + 3 = 0
=> m = 3/2 & m = -3/2
=> m = ± 3/2 Answer
Hope it will help you :-)