Question -
Answer -
(i) a тАУ (-b) = a + b
LHS = 21 тАУ (-18) = 21 + 18 = 39
RHS = 21 + 18 = 39
LHS = RHS Hence, verified.
(ii) a тАУ (-b) = a + b
LHS = 118 тАУ (-125) = 118 + 125 = 243
RHS = 118 + 125 = 243
LHS = RHS Hence, verified.
(iii) a тАУ (-b) = a + b
LHS = 75 тАУ (-84) = 75 + 84 = 159
RHS = 75 + 84 = 159
LHS = RHS Hence, verified.
(iv) a тАУ (-b) = a + b
LHS = 28 тАУ (-11) = 28 + 11 = 39
RHS = 28 + 11 = 28 + 11 = 39
LHS = RHS Hence, verified.