Math, asked by kiranakash193, 9 months ago

Factorise x square minus 2x minus 9

Answers

Answered by Anonymous
3

x(x-9)-3 (×-3)

=(x-9)(x-3)

hope it helps you.

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Answered by Mora22
2

Answer:

 {x}^{2}  - 2x - 9 \\  if \: quadratic \: equation \: is \: a {x}^{2}  + bx + c \\ then \: x =  \frac{ - b + or -  \sqrt{ {b}^{2} - 4ac } }{2a}

x =  \frac{ - ( - 2) + or -  \sqrt{4 - 4(1)( - 9)} }{2(1)}

x =  \frac{2 + or - 2 \sqrt{10} }{2}

x = 1 + or -  \sqrt{10}

 {x}^{2}  - 2x - 9 =(x  - (1 +  \sqrt{10})) (x - (1 -  \sqrt{10} ))

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