please answer the question:
SOLVE USING IDENTITIES:
(a) (5x+3)(5x+3)
(b) (7a+5)(7a-5)
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Step-by-step explanation:
b) (7a+5)(7a-5)
using x^2-y^2=(x+y)(x-y)
x=7a y=5
(7a+5)(7a-5)
7a^2-5^2