The number of points of intersection of the polynomial P(x) = x + 8 with x-axis is (a) 0
(b) 1
(c) 2
(d) 3
Answers
Answered by
14
Answer:
f(x)=x ³ −1
it intersect x-axis if
f (x) = 0
x ³ −1= 0
(x−1)(x ² +x+1)=0
⇒(x−1)=0 or (x ² +x+1)=0
⇒x=1 because (x ² +x+1)=0 has no real roots.
∴ it intersect at x-axis at only one point x=1.
Option B is correct.
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Answered by
6
Answer:
f(x)=x ³ −1
it intersect x-axis if
f (x) = 0
x ³ −1= 0
(x−1)(x ² +x+1)=0
⇒(x−1)=0 or (x ² +x+1)=0
⇒x=1 because (x ² +x+1)=0 has no real roots.
∴ it intersect at x-axis at only one point x=1.
Option B is correct.
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