Question

Using identity find 91

²

- 89²​

Answer 1

Answer:

${91}^{2} - {89}^{2} \\ (91 + 89)(91 - 89) \\ 180 \times 2 \\ 360$

Identity used

${a}^{2} - {b}^{2} = (a + b)(a - b)$

Answer 2

Answer:

using identify (a² - b²)

Step-by-step explanation:

91² - 89²

here, a = 91 and b = 89

using identify (a² - b²) = (a +b) (a -b)

(91 +89) ( 91 -89 )

(180 ) (2)

= 180×2

360 answer