The sum of two numbers is 100 and their product is 900. What is the number?
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Let the first number be x.
So, the second number=100-x
↪ According to the given condition,
➡x(100-x)=900
➡100x-x²=900
➡x²-100x+900=0
➡x²-10x-90x+900=0
➡x(x-10)-90(x-10)=0
➡(x-10)(x-90)=0
Hence, the two numbers are
↪90
↪10
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