Question

pls solve this
$100 ^{2} - 99 {}^{2}$
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Answer 1

Answer:

19801

Step-by-step explanation:

100^2=10000

99^2=9801

19801

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Answer 2

Answer:

$199$

Step-by-step explanation:

$use \: the \: formula \: {a}^{2} - {b}^{2} = (a + b)(a - b)$

${100}^{2} - {99}^{2}$

$(100 + 99)(100 - 99)$

$199 \times 1$

$= 199$