Caranya sudah terlampir , semoga membantu
9) √8 x √18
= (√4 x √2) x (√9 x √2)
= 2√2 x 3√2
= 6√4
= 6 x 2
= 12 (C)
10) (4a√3 - 3)²
gunakan rumus (a - b)² = a² - 2ab + b²
= (4a√3)² - 2(4a√3)(3) + (3)²
= (4a√3 x 4a√3) - 2(12a√3) + 9
= (16a² x √9) - 24a√3 + 9
= (16a² x 3) - 24a√3 + 9
= 48a² - 24a√3 = 9 (c)
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Caranya sudah terlampir , semoga membantu
9) √8 x √18
= (√4 x √2) x (√9 x √2)
= 2√2 x 3√2
= 6√4
= 6 x 2
= 12 (C)
10) (4a√3 - 3)²
gunakan rumus (a - b)² = a² - 2ab + b²
= (4a√3)² - 2(4a√3)(3) + (3)²
= (4a√3 x 4a√3) - 2(12a√3) + 9
= (16a² x √9) - 24a√3 + 9
= (16a² x 3) - 24a√3 + 9
= 48a² - 24a√3 = 9 (c)