Factorize
225-9m2
Solution
We
use difference of two squares a2 – b2 =
(a - b)(a + b)
225-9m2 =
152 - 32m2
= 152 - (3m)2
= (15 - 3m)(15 + 3m)
Hence 225 - 9m2 = (15 - 3m)(15+ 3m)
TRY THIS…………….
Factorize
81 - 49c2
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