Question

factorise the expression x^2-8x-9​

Answer 1

Answer:

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Step-by-step explanation:

${x}^{2} - 8x - 9 \\ = x² + 1x - 9x - 9 \\ = x(x + 1) - 9(x - 1) \\ = (x - 9) (x + 1)$

Answer 2

Answer:

9,1

Step-by-step explanation:

X^ - 8x-9=0

x^ - 9x+1x-9=0

x(x-9) -1(x-9)=0

x-9=0 or X-1=0

x= 9 or x=1