3 years ago

HELP!! 100 POINTS!!

Mathematics

2 answers:

NNADVOKAT [17]3 years ago

5 0

Answer:

x=9 x=-1

Step-by-step explanation:

x²-8x-9=0 a=1 b=-8 c=-9

you have to use the quadratic formula to get the values.

Sladkaya [172]3 years ago

3 0

Answer:

It's incorrect

x = -1, 9

Step-by-step explanation:

x²-8x-9=0

x²-8x=9

x²-8x+16=9+16

(x-4)²=25

You have to take square root both sides, so RHS would be sqrt(25) = 5 (+/-)

x-4=+/-5

x-4=5

x-4=-5

x=9

x=-1

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