Solve x2-81=0 A.(0) B.(-9) C.(-9,9) D.(9)
1 answer:
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Answer:
Step-by-step explanation:
According to the two tangent theory, tangent MN and tangent NP, which are both from point N, are congruent.
That is,
Solve for x
Subtract 4 from both sides
Answer:
(1+√7,0),(1−√7,0)
Step-by-step explanation:
You can't factor the expression evenly, so use the quadratic formula.
a = 2
b= -4
c= -12
End result: (1+√7,0),(1−√7,0)