Question

185×185-115×115 solve this using identity.

Answer 1

Answer:

34,225-13,225

21,000

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Answer 2

★ Question ★

185×185-115×115 solve this using identity.

$\leadsto 85×185-115×115\\ \leadsto (185)^2-(115)^2\\ \leadsto (185+115)(185-115)\\ \leadsto(300)(70)\\ \leadsto 21000$

$\rule{300}2$

Formula used.

$\implies a^2-b^2=(a+b)(a-b)$