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sqrt9(36)+12(36)+15(36)

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Carcass
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sqrt9(36)+12(36)+15(36) [#permalink] New post   20 Jul 2020, 11:43
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94% (00:41) correct 5% (00:05) wrong based on 17 sessions

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\(\sqrt{9(36)+12(36)+15(36)}\)


Show: :: OA
36



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GreenlightTestPrep
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Re: sqrt9(36)+12(36)+15(36) [#permalink] New post   21 Jul 2020, 09:38
2
Carcass wrote:
\(\sqrt{9(36)+12(36)+15(36)}\)

Show: :: OA
36



Key property: If \(x \geq 0\), then \(\sqrt{x^2} = x\)

Given: \(\sqrt{9(36)+12(36)+15(36)}\)

Factor out the \(36\) to get: \(\sqrt{36(9 + 12 + 15)}\)

Simplify to get: \(\sqrt{36(36)}\)

In other words: \(\sqrt{36^2}\)

Apply the above property to get: \(36\)

Answer: \(36\)

Cheers,
Brent
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Re: sqrt9(36)+12(36)+15(36) [#permalink] New post   21 Jul 2020, 09:51
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GREAT

More question , of course, in the coming days. Tough ones

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Re: sqrt9(36)+12(36)+15(36) [#permalink] New post   22 Jul 2020, 06:40
Why does the calculator here when I sq. root 1.375 or 1.5 it gives me 1 without decimal ?
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Re: sqrt9(36)+12(36)+15(36) [#permalink] New post   22 Jul 2020, 09:42
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mmmhhhh

You are right. Weird. Let me investigate. Thank you sir
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Re: sqrt9(36)+12(36)+15(36) [#permalink]
22 Jul 2020, 09:42
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