Question

please solve question 19 20 21 22​

Answer 1

Answer:

Step-by-step explanation:

21 . 2 = 8.63 × 8.63 - 1.37×1 3/0.726

=( 8.63)² - (1.37)²/0.726

(8.63+1.37)(8.63-1.37)/0.726

= 10×7.26/0.726

72.6/0.726

= 100