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secondary 2 | Maths
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Hiii I need help with aii and b...thankyou so much
Date Posted: 1 year ago
Views: 161
(a)
(i)
80=2²×2²×5
45=3²×5
80×45=2²×2²×5×3²×5
=2²×2²×5²×3²
∴ 80×45 is a perfect square
(ii)
80k=2³×2×5×(2²×5²)
= 8³×5³ = 40³
k = 2²×5² = 100 (Ans)
(b)
15=3×5
18=3²×2
270÷(5×2) = 27 (Ans)
(i)
80=2²×2²×5
45=3²×5
80×45=2²×2²×5×3²×5
=2²×2²×5²×3²
∴ 80×45 is a perfect square
(ii)
80k=2³×2×5×(2²×5²)
= 8³×5³ = 40³
k = 2²×5² = 100 (Ans)
(b)
15=3×5
18=3²×2
270÷(5×2) = 27 (Ans)
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done
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Hope this helps
Date Posted:
1 year ago
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