Question

simplify in proper sequence​

Answer 1

1. 8√45 - 8√20 + √245 - 3√125

= 8√(5×9) - 8√(4×5) + √(49×5) - 3√(25×5)

= 24√5 - 16√5 + 7√5 - 15√5

= 31√5 - 31√5

= 0

2. (4√5 - 3√2) (4√5 + 3√2)

= (4√5)^2 - (3√2)^2

= (16×5) - (9×2)

= 80 - 18

= 62