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= -5√5 + 7√5
= 2√5
3. ( 7√32 - 4√8) + 2√2
= ((7(√4×√8) - 4√8) + 2√2
= ( 7×2 ×√8) + 2√2
= 14(√8) + 2√2
= 14(√4×√2) + 2√2
= 14(2× √2) + 2√2
= 28√2 + 2√2
= 30√2
4. (6√27 + 3) - 3√12
= ((6(√9 × √3)) + 3) - 3(√4 × √3)
= (6×3×√3) + 3 - (3 × 2 × √3)
= 18√3 + 3 - 6√3
= 18√3 - 6√3 + 3
= 12√3 + 3
2. (√5-6√5) + 7√5 = -5√5 + 7√5 = 2√5
3. (7√32-4√8) + 2√2 = (7√16x2 - 4√4x2) + 2√2
= (7x4√2-4x2√2) + 2√2
= (28√2-8√2) + 2√2
= 20√2 + 2√2
= 22√2
4. = (6√9x3 + 3) - 3√4x3
= (6x3√3+3) - 3x2√3
= (18√3+3) - 6√3
= 18√3-6√3+3
= 12√3+3