1) √72 + 2√50
= √36 x 2 + 2 √25 x 2
= 6 √2 + 2 +5 √2
= 6 √2 + 7 √2
= 13 √2
2) 9√27 - 2√12
= 9√9 x 3 - 2 √4 x 3
= 9+3√3 - 2+2√3
= 12√3 - 4√3
= 8 √3
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= √(36x2) + 2√(25x2)
= 6√2 + 2x5√2
= 6√2 + 10√2
= (6+10)√2
= 16√2
9√27 - 2√12
= 9√(9x3) - 2√(4x3)
= 9x3√3 - 2x2√3
= 27√3 - 4√3
= 23√3
1) √72 + 2√50
= √36 x 2 + 2 √25 x 2
= 6 √2 + 2 +5 √2
= 6 √2 + 7 √2
= 13 √2
2) 9√27 - 2√12
= 9√9 x 3 - 2 √4 x 3
= 9+3√3 - 2+2√3
= 12√3 - 4√3
= 8 √3