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If px²+ 3x + q = …

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If px²+ 3x + q = 0 has two roots x = -1 and x = -2, the value of q - p is

Posted by Sushila Devi 5 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Rohit Panchal 5 years, 2 months ago

Your and is wrong ?

2Thank You

Naman Karwa 5 years, 2 months ago

When x=-1 Equation1: p(-1)^2 + 3(-1) +q=0 p - 3 + q = 0 => q = 3 - p.......a Equation2: p(-2)^2 + 3(-2) + q = 0 4p - 6 + q = 0 From eq a: 4p - 6 + 3- p = 0 .°. p = 1 So, q =3-p q = 2 Now, q - p = 2-1 = 1.......ans.

2Thank You

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CBSE > Class 10 > Mathematics