berapa hasil dari 1. 4√3 × 2√152. √80 - 3√45 + 3√5makasih buat yang udah mau jawab.... Question from @aurakrn

August 2022 2 5 Report

berapa hasil dari
1. 4√3 × 2√15
2. √80 - 3√45 + 3√5

makasih buat yang udah mau jawab

$4 \sqrt{3} \times 2 \sqrt{15} \\ = 4.2 \sqrt{3 \times 15} \\ = 8 \sqrt{45} \\ = 8 \sqrt{9 \times 5} \\ = 8.3 \sqrt{5} \\ = 24 \sqrt{5}$

$\sqrt{80} - 3 \sqrt{45} + 3 \sqrt{5} \\ = \sqrt{16 \times 5} - 3 \sqrt{9 \times 5} + 3 \sqrt{5} \\ = 4 \sqrt{5} - 3.3 \sqrt{5} + 3 \sqrt{5} \\ = 4 \sqrt{5} - 9 \sqrt{5} + 3 \sqrt{5} \\ = - 2 \sqrt{5}$

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1 votes Thanks 2

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FrPalz

No 1

$4 \sqrt{3} \times 2 \sqrt{15}$

$= 8 \sqrt{45} \\$

$= 8 \sqrt{ {3}^{2} \times 5}$

$= 8 \sqrt{ {3}^{2} \times \sqrt{5} }$

$= 8 \times 3 \: \sqrt{5}$

$= 24 \sqrt{5}$

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No 2

$\sqrt{80} - 3 \sqrt{45 } + 3 \sqrt{5}$

$= \sqrt{ {4}^{2} \times 5 } - 3 \: \sqrt{ {3}^{2} \times 5 } + 3 \sqrt{5}$

$= \sqrt{ {4}^{2} } \times \sqrt{5} - 3 \sqrt{ {3}^{2} } \times \sqrt{15} + 3 \: \sqrt{5}$

$= 4 \sqrt{5 - 3} \times 3 \sqrt{5} + 3 \sqrt{5}$

$= 4 \sqrt{5} - 9 \sqrt{5} + 3 \sqrt{5}$

$= - 2 \sqrt{5}$

0 votes Thanks 1

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