Question

5√72+3√50-4√98
Dengan jalan

Answer 1

Jawaban:

√72 = √(9 x 8) = 3√8

√50 = √(25 x 2) = 5√2

√98 = √(49 x 2) = 7√2

5√72 + 3√50 - 4√98 = 5(3√8) + 3(5√2) - 4(7√2) = 15√8 + 15√2 - 28√2

15√8 + 15√2 - 28√2 = 15√8 + (15 - 28)√2 = 15√8 - 13√2

15√8 - 13√2.

Answer 2

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[tex] \begin{aligned}5 \sqrt{72} + 3 \sqrt{50} - 4 \sqrt{98} & = 5 \sqrt{36 \times 2} + 3 \sqrt{25 \times 2} - 4 \sqrt{49 \times 2} \\& = 5 \times 6 \sqrt{2} + 3 \times 5 \sqrt{2} - 4 \times 7 \sqrt{2} \\ &=30 \sqrt{2} + 15 \sqrt{2} - 28 \sqrt{2} \\ &= (30 + 15 - 28) \sqrt{2} \\ & = 17 \sqrt{2} \end{aligned}[/tex]

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