Question

simplify 12 +[(-45)+(-20)]​

Answer 1

=12√9×2+6√4×5-6√49×3+3√25×5+8√9×5
=12×3√2+6×2√5-6×7√3+3×5√5+8×3√5
=16√2+12√5-42√3+15√2+24√5
=51√2+36√5-42√3

Answer 2

Given number = 12+[(-45)+(-20)]

Solution:-

=> 12+[(-45)+(-20)]

=> 12+[-45-20]

=> 12+ (-65)

=> 12-65

=> -53

Ans = -53 .