trinswimmer trinswimmer

26-10-2018
Mathematics

contestada

please let me know how to factor thisss. and give me the steps.

please let me know how to factor thisss and give me the steps class=

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eftihiaa eftihiaa

26-10-2018

You have to find first the discriminant
∆=8^2-4*(-1) *(-7) =36
x=(-8±√36) /-2=(-8±6)/-2=4±3=1 or 7
So x(1)=1 or x(2)=7
-x^2+8x-7=[x-x(1) ][x-x(2) ]=(x-1) (x-7)

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