Matematika

Pertanyaan

6 Soal Menyederhanakan Bentuk Akar.

1. 2√96 + √24 - √150
2. 5√80 + 3√96 - √180 + 2√54
3. 4√72 + 2√243 + √128 - 3√108
4. 2√5 x 3√12
5. 3√6 (√3 - √8)
6. (√5 + √3) x (√5 - √3)

2 Jawaban

  • 1. 2√96 + √24 - √150 = 5√6
    2. 5√80 + 3√96 - √180 + 2√54 = 14√5 + 18√6
  • 1.) 2√96 + √24 - √150
    = 2 √4x3x4x2 + √4x6 - √6x5x5
    = 2x4 √6 + 2√6 - 5√6
    = 8√6 + 2√6 - 5√6
    =10√6- 5√6
    = 5√6

    2.) 5√80 + 3√96 - √180 + 2√54
    = 5√4x2x5x2 + 3√4x4x3x2 - √3x2x3x5x2 + 2√9x6
    = 5x2x2 √5 + 3x4 √6 - 3x2 √5 + 2x3 √6
    = 20√5 + 12√6 - 6√5 + 6√6
    = 14√5 + 18√6

    3.) 4√72 + 2√243 + √128 - 3√108
    = 4√9x4x2 + 2√7x7x7 + √8x8x2 - 3√9x3x2x2
    = 4x3x2 √2 + 2x7 √7 + 8√2 - 3x3x2 √3
    = 24√2 + 14√7 + 8√2 - 18√3
    = 32√2 + 14√7 - 18√3

    4.) 2√5 x 3√12
    = 6√5x12
    = 6√60 = 6√3x2x5x2 = 6x2 √3x5 = 12√15

    5.) 3√6 (√3-√8)
    = (3√6 x √3) - (3√6 x √8)
    = (3√3x3x2) - (3√3x2x4x2)
    = (3x3√2) - (3x4√3)
    = 9√2 - 12√3

    6.) (√5 + √3) x (√5 - √3)
    = (√5)² - (√3)²
    = 5 -3 =2

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