Question

(3.9)²- (1.7)² / (3.9 -1.7)​

Answer 1

$\huge\texttt{Solution:}$

$\frac{ {(3.9)}^{2} - {(1.7)}^{2} }{(3.9 - 1.7)} \\ = \frac{(3.9 + 1.7)(3.9 - 1.7)}{(3.9 - 1.7)} \\ = 3.9 + 1.7 \\ = 5.6$

Answer 2

$15.21 - 2.89 \div (2.2)$

$12.32 \div 2.2$

$5.6$

$\bold{hope \: its \: help \: you}$