Question

identity :- 1.02 - 0.98​

Answer 1

According to (a+b)(a-b) = a² - b²,

$1.02 \times 0.98 \\ \\ (1+0.02)(1-0.02) \\ \\ 1^2 - (0.02)^2 \\ \\ 1 - 0.0004 \\ \\ \bold{0.9996}$

Sorry, the question is 1.02 - 0.98!!!

According to (a+b) - (a-b) = 2b

$1.02 - 0.98 \\ \\ (1+0.02)-(1-0.02) \\ \\ 1+0.02-1+0.02 \\ \\ 2 \times 0.02 \\ \\ \bold{0.04}$

Thank you. Have a nice day. :-)

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