if x²-7x+2=0 calculate the value of (x²-9/x²) is..
Matematika
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Pertanyaan
if x²-7x+2=0 calculate the value of (x²-9/x²) is..
1 Jawaban
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1. Jawaban Cadilac
x²=7x-2
so (x²-9/x²) =((7x-2)²-9/(7x-2)²)
=49x²-28x+4-9 / 49x²-28x+4/9
=49x²-28x-5/(7x-2)²
=(7x+1)(7x-5)/(7x-2)²