ractice set 2.5

1.	ractice set 2.5
Answer» Let present age of Pragati be xThen,Pragati age two years ago = (x - 2)Pragati age years hence = (x + 3) As per given condition(x-2)(x + 3) = 84x^2 + 3x - 2x - 6 = 84x^2 + x - 90 = 0x^2 + 10x - 9x - 90 = 0x(x + 10) - 9(x + 10) = 0(x - 9)(x + 10) = 0x = 9, - 10 Negative value not possible Therefore, present age of Pragati = 9 years

Answer»

Let present age of Pragati be xThen,Pragati age two years ago = (x - 2)Pragati age years hence = (x + 3)

As per given condition(x-2)(x + 3) = 84x^2 + 3x - 2x - 6 = 84x^2 + x - 90 = 0x^2 + 10x - 9x - 90 = 0x(x + 10) - 9(x + 10) = 0(x - 9)(x + 10) = 0x = 9, - 10

Negative value not possible

Therefore, present age of Pragati = 9 years

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ractice set 2.5

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