Question

pls help me out from this question it's urgent pls pls

Answer 1

it's B
as x^2-8x+15=0
x^2-3x-5x+15=0
x(x-3)-5(x-3)=0
(x-3)(x-5)=0


therefore B is the option in which roots are 3 and 5.

it's best answer
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Answer 2

let
$\alpha = 3 \: and \: \beta = 5 \\ qudratic \: equation \: is \: \\ {x}^{2} + \: (\alpha + \beta )x + (\alpha \beta ) \\ substitute \: the \: values \: of \: \alpha \beta \\ in \: this \: equation \: \\ {x}^{2} + (8)x + (15)$
hope this helps you