Question

evaluate the following
a). 21² - 20²
b). 192² - 191²​

Answer 1

${21}^{2} - {20}^{2} \\ (21 - 20)(21 + 20) \\ 1 \times 41 = \sf \red{41}$

${(192)}^{2} - {(191)}^{2} \\ (192 - 191)(192 + 191) \\ 1 (383) = \sf \red{ 383}$

Answer 2

1st. Is 41 , 2nd. 383 hope u like my answer please mark me as brainliest