Using property of perfect squares, find the value of the following:
(b) (78)² - (77)²
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Answered by
1
Answer:
78+77*78-77=155
A+B*A-B=A^2-B^2
Answered by
0
using
(a+b)(a-b) identity
(78+77)(78-77)
155(1)
155
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