Due to heavy storm an electric wire got bent as shown in the figure . It followed a mathematical
shape . Answer the following questions.
(i)
Name the shape in which the wire is bent.
(a) Spiral (b) ellipse (c) linear (d) Parabola
(ii)
How many zeroes are there for the polynomial (shape of wire )
(a) 2 (b) 3 (c) 1 (d) 0
(iii)
The zeroes of the polynomial are
(a) -1,5 (b) -1,3 (c) 3,5 (d) -4,2
(iv)
What will be the expression of the polynomial?
(a) X2
+2x -3 (b) x2
-2x +3 (c) 3,5 (d) x2
+2x+3
(v)
What is value of polynomial if x=-1?
(a) 6 (b) -18 (c) 18 (d) 0
Answers
Answered by
0
Step-by-step explanation:
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Answered by
2
Answer:
(i) parabola
(ii) (a) 2
(iii) (b) (-1,3)
(iv) (c) x²-2x-3
(v) (d) 0
Step-by-step explanation:
(ii) pints of intersection at x-axis
(iv) α=-1 β=3
α+β= -1 + 3 = 2
αβ = -1 x 3 = -3
x² - (α+β)X + αβ
=⟩ x² - (2)x +(-3)
x² - 2x - 3
(v) p(x) = x²- 2x - 3
p(-1) = (-1)² - 2(-1) - 3
= 1 + 2 - 3 = 0
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