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Marizza181 [45]
3 years ago
7

Plz solve this question

Mathematics
1 answer:
Rus_ich [418]3 years ago
6 0

7). 1/(√7-√11)

= 1×(√7+√11)/(√7-√11)(√7+√11)

= √7+√11 / (√7)² - (√11)²

= √7 + √11 / 7 - 11

= √7 + √11 / (-4)

<em>EXPLAINATION</em><em>:</em>

<em>to</em><em> </em><em>rationalize</em><em> </em><em>the</em><em> </em><em>denominator</em><em> </em><em>we</em><em> </em><em>multiply</em><em> </em><em>the</em><em> </em><em>numerator</em><em> </em><em>and</em><em> </em><em>the</em><em> </em><em>denominator</em><em> </em><em>by</em><em> </em><em>the</em><em> </em><em>denominator</em><em>,</em><em> </em><em>but</em><em> </em><em>with</em><em> </em><em>the</em><em> </em><em>opposite</em><em> </em><em>sign</em><em>.</em>

<em>For</em><em> </em><em>example</em><em> </em><em>-</em><em> </em><em>i</em><em>n</em><em> </em><em>t</em><em>h</em><em>e</em><em> </em><em>f</em><em>i</em><em>r</em><em>s</em><em>t</em><em> </em><em>q</em><em>u</em><em>e</em><em>s</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>w</em><em>e</em><em> </em><em>m</em><em>u</em><em>l</em><em>t</em><em>i</em><em>p</em><em>l</em><em>i</em><em>e</em><em>d</em><em> </em><em>1</em><em> </em><em>a</em><em>n</em><em>d</em><em> </em><em>√</em><em>7</em><em> </em><em>-</em><em> </em><em>√</em><em>1</em><em>1</em><em> </em><em>b</em><em>y</em><em> </em><em>√</em><em>7</em><em> </em><em>+</em><em> </em><em>√</em><em>1</em><em>1</em><em> </em><em>.</em>

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