Math, asked by wwwamangarg5964, 11 months ago

,ல் ‌கீ‌ழ்‌க்கா‌ண்பனவ‌ற்ற‌ன் ம‌தி‌ப்புகளை மூன்று தசம இட‌த்‌திரு‌த்த‌மாக கா‌ண்க
i)√40 - √20
ii)√(300 ) + √90 - √8

Answers

Answered by steffiaspinno
0

i)1.852     ii)23.978

விளக்கம்:

i)√40 - √20

\sqrt{40}=\sqrt{2 \times 2 \times 2 \times 5}

\sqrt{20}=\sqrt{2 \times 2 \times 5}  

\sqrt{40}-\sqrt{20}

\sqrt{2 \times 2 \times 2 \times 5}-\sqrt{2 \times 2 \times 5}

=2 \sqrt{10}-2 \sqrt{5}

=2(3.162)-2(2.236)

=6.324-4.472

=1.852

ii)√(300 ) + √90 - √8

\sqrt{300}=\sqrt{2 \times 2 \times 5 \times 5 \times 3}

\sqrt{90}=\sqrt{5 \times 2 \times 3 \times 3}

  √8=    \sqrt{2 \times 2 \times 2}

(\sqrt{3}= 1.732, \sqrt{10}=3.162, \sqrt{2}=1.414)

=2 \times 5 \times \sqrt{3}+3 \sqrt{10}-2 \sqrt{2}

=10 \sqrt{3}+3 \sqrt{10}-2 \sqrt{2}

=10(1.732)+3(3.162)-2(1.414)

=17.32+9.486-2.828

=26.806-2.828

= 23.978

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