Math, asked by samruddhigorad1980, 2 months ago

find the errors in these expressions & Correct them. (2a+9) (2a-9) = 4a²+81

Answers

Answered by sgss2017

0

Answer:

(2a)² - (9)² = 4a² - 81

Step-by-step explanation:

the mathematical identity of

(a + b) × (a - b) = a² - b²

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