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vivalakoda

  • 2 years ago

Radicals help!

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  1. elisichi
    • 2 years ago
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    What can I help you with?

  2. vivalakoda
    • 2 years ago
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    (7+√2)(8-3√2)

  3. Arhin
    • 2 years ago
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    54+root2

  4. CliffSedge
    • 2 years ago
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    ^incorrect.

  5. vivalakoda
    • 2 years ago
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    I'm not necessarily looking for an answer, more of an explanation so I can understand the problem. Thank Arhin, anyway..

  6. vivalakoda
    • 2 years ago
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    Thanks*

  7. CliffSedge
    • 2 years ago
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    FOIL First Outer Inner Last \(\huge (a+b)(c+d) = ac+ad+bc+bd\)

  8. Arhin
    • 2 years ago
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    sorry typing mistake

  9. elisichi
    • 2 years ago
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    \[(7+√2)(8-3√2) = 54-21\sqrt{2}+ 8\sqrt{2} -(2)(3)=54-13\sqrt{2}-6 = 48-13\sqrt{2}\]Ok so what you do is you expand.

  10. Arhin
    • 2 years ago
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    @elisichi is rather50 −13√2

  11. elisichi
    • 2 years ago
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    ^whoops. my bad. 7 *8= 56. Youre right

  12. vivalakoda
    • 2 years ago
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    I think I understand now. Thank- you!

  13. elisichi
    • 2 years ago
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    No problem!

  14. Arhin
    • 2 years ago
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    @elisichi well done

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