Question

evaluate:. [(674)² - ( 326)²] and [(18.6)² - ( 1.4)²].



please answer it fastt!​

Answer 1

Step-by-step explanation:

${x}^{2} - {y}^{2} = (x + y)(x - y)$

${(674)}^{2} - {(326)}^{2} = >$$(674 + 326)(674 - 326) = >$

$1000 \times 348 = 348000$

${(18.6)}^{2} - {(1.4)}^{2} = (18.6 + 1.4) \times$

$(18.6 - 1.4) = 20 \times 17.2 = 344$

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Answer 2

Answer:

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