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3 years ago

Rationalize the denominator and simplily.

Mathematics

2 answers:

pychu [463]3 years ago

4 0

Answer:

Step-by-step explanation:

(a-b)² = a²-2ab + b²

(a+b)(a-b)=a²-b²

$\frac{\sqrt{a+1} -2}{\sqrt{a+1}+2}= \frac{(\sqrt{a+1}-2)(\sqrt{a+1}-2 )}{(\sqrt{a+1}+2 )(\sqrt{a+1}-2)}\\\\$

$=\frac{(\sqrt{a+1}-2 )^{2}}{(\sqrt{a+1} )^{2}-2^{2}}\\\\=\frac{(\sqrt{a+1})^ {2}-2*\sqrt{a+1}*2+2^{2} }{a+1-4}\\\\=\frac{a+1 - 4\sqrt{a+1}+4 }{a-3}\\\\=\frac{a+5-4\sqrt{a+1} }{a-3}$

mote1985 [20]3 years ago

3 0

Answer:

( (√ a+ 1) − 2 ) ^2/a-3

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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zvonat [6]

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Step-by-step explanation:

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3 years ago

7. 2+ 32 = 5+ 3z

SVETLANKA909090 [29]

Answer:

$z=9\frac{2}{3}$

Step-by-step explanation:

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3 years ago

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katen-ka-za [31]

Answer:

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3 years ago

Rationalize the denominator and simplily.​

Rationalize the denominator and simplily.