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Asked Dec 7, 2019
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Practice 5.7

Question #7 

 

7. Rationalize the expression
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VI + 5 - Va
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7. Rationalize the expression Show your work! VI + 5 - Va

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Expert Answer

Step 1

We need to rationalize the given expression

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Vx + 5 – Vx

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Step 2

We know th...

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a – b3 a – b3 = (a – b)(a² + ab + b²) => (a – b) = (1) a2 + ab + b2 Vx + 5 and b = Vx Let, a = 3 3 (Vx + 5)° – (V)* – Vĩ = a – b = Vx+ 5 Then, (Vĩ + 5)° + (Vx + 5)(V7) + (V7)° x + 5 – x Vx + 5 – Vĩ = => (x + 5)2/3 + (x(x + 5)) + (x)²/3 Vx + 5 – Vx = (2) 2 (x + 5)3 + (x(x +5))³ + (x)3

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