Question

find the value of 407x393 by suitable identity

Answer 1

here is your answer.....

Answer 2

Hey friend,
Here is the answer you were looking for:
$407 \times 39 3 \\ \\ we \: can \: write \: it \: as \\ \\ (400 + 7)(400 - 7) \\ \\ using \: the \: identity \\ (a + b)(a - b) = {a}^{2} - {b}^{2} \\ \\ = {(400)}^{2} - {(7)}^{2} \\ \\ = 160000 - 49 \\ \\ = 159951$

Hope this helps!!!!

@Mahak24

Thanks...
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