using identity (2a-6) (2a+6)
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Step-by-step explanation:
(a-b) (a+b)= a² -b²
ye bali identity hai
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Answer:
the answer for a is +/-3
Step-by-step explanation:
by using identity
(a+b)(a-b)=a^2b^2
4a^2=36
a^2=9
taking square root on both sides
a=+/-3
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