Given info:
Evaluate,
[3 + {-5 (2 - 4) ÷ 2}].3
⇛[3 + {-5(-2) ÷ 3}].3
⇛[3 + {-5 × -2) ÷ 3}].3
Now, see in equation both minus (-) sign will cancel out. Because there is multiplication (×) sign.
Suppose -a × -b = a × b = ab. So that is reason. why minus (-) will cancel out in equation.
⇛[3 + { (5 × 2)÷3}].3
⇛[3 + {10 ÷ 3}].3
⇛[3 + {10 × 1/3}].3
⇛[3 + {10/3}]. 3
⇛3 + {10/3}×3
⇛3 + {10×3}/3
⇛3 + 30/3
⇛3 + 10
⇛13. Ans.
