Question

The value of
$(89 { }^{2} - 79 {}^{2} )$
​

Answer 1

(89² - 79²) by using identity a²-b²=(a+b)(a-b)

(89+79)(89-79)

(168)(10)

1680 is the answer

Answer 2

$\sf \large \underline \pink{answer : } \\ \\ 89² \: – \: 79² \: = \: \fbox{ 1680}\\ \\ \\ \sf \large \underline \pink{given : } \\ \\ \tt \purple{\: The \: \: value \: \: of \: \: 89² \: – \: 79²} \: \\ \\ \\ \sf \large\underline \pink{using \: \: formula \: : } \\ \\ \fbox {(a - b)(a + b) \: = \: \: a² \: - \: b² } \\ \\ \\ \sf \large \underline \pink{solution : } \\ \\ \tt \large\purple{ \: 89² \: – \: 79²} \\ \\ \tt \implies \: (89 - 79)(89 + 79) \\ \\ \tt \implies \:(10)(168) \\ \\\tt \implies \large \fbox\purple{ 1680}$