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Distance Formula

For what valu...

Question

For what value of p does QE equation 25x square+10px+9=0 have equal numbers

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Solution

25x2 + 10px + 9 = 0
For equal roots discriminant =0
Discriminant ,D = b2 - 4ac = 0
= (10p)2 - 4 (9)(25) = 0
= 100p2 - 900 = 0
= p2 = 900/100
= p2 = 9
= p = 3, - 3

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