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  • 03-12-2020
  • Mathematics
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answer 8 and 9 for 10+ points

answer 8 and 9 for 10 points class=

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pierrette132 pierrette132
  • 03-12-2020

Answer:

question 8 : it is equal to 0

Question 9 : 4+5[tex]\sqrt{2}[/tex]

Step-by-step explanation:

= [tex]\sqrt{7} -\sqrt{28}\\2\sqrt{7} - \sqrt{4x7}\\2\sqrt{7} - 2\sqrt{7}\\0\\\sqrt{2} (5+\sqrt{8})\\5\sqrt{2} + \sqrt{2*8}\\5\sqrt{2} + 4\\4 + 5\sqrt{2}[/tex]

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