What should come in place of question mark (?) in the following question ?
$$(78.95)^{2}-(43.35)^{2}=?$$
We know that, a^2 - b^2 = (a-b)(a+b)
Here, $$(78.95)^{2}-(43.35)^{2}$$ = $$(78.95+43.35)\times (78.95-43.35)$$
= $$122.3\times35.6$$
= 4353.88
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