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Tentukan nilai  yang belum diketahui! b.

Tentukan nilai begin mathsize 14px style x space dan space y end style yang belum diketahui!

b.

   

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell x squared end cell equals cell 18 squared plus 24 squared end cell row x equals cell plus-or-minus square root of 18 squared plus 24 squared end root end cell row blank equals cell plus-or-minus square root of 324 plus 576 end root end cell row blank equals cell plus-or-minus square root of 900 end cell row blank equals cell plus-or-minus 30 space cm end cell end table end style  

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell y squared end cell equals cell 16 squared plus 30 squared end cell row y equals cell plus-or-minus square root of 16 squared plus 30 squared end root end cell row blank equals cell plus-or-minus square root of 256 plus 900 end root end cell row blank equals cell plus-or-minus square root of 1156 end cell row blank equals cell plus-or-minus 34 space cm end cell end table end style  

Karena undefined adalah panjang sisi, maka keduanya harus positif.

Jadi, nilai undefined adalah begin mathsize 14px style 30 space cm space dan space 34 space cm end style.

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