Evaluate using suitableldentities 1.(2a+7)(2a-7)
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Answered by
18
Answer:
(2a+7)(2a-7)
=(2a)² - (7)²
=4a² - 49
I hope this helps!
Answered by
1
Identity -- (a+b)(a-b) = a^2 - b^2
So , (2a+7)(2a-7) = (2a)^2 - (7)^2
(2a+7)(2a-7) = 4a^2 - 49
So , (2a+7)(2a-7) = (2a)^2 - (7)^2
(2a+7)(2a-7) = 4a^2 - 49
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