In a polyhedron,there are 17 faces and 17 vertices.How many edges have polyhedron.
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Answer:
15 is the correct answer
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A quadratic polynomial has maximum two zeroes.
Let us take an example:
Factorise the quadratic polynomial x
2
+2x−15=0 as shown below:
x
2
+2x−15=0
x
2
+5x−3x−15=0
x(x+5)−3(x+5)=0
x−3=0 or x+5=0
x=3 or x=−5
Therefore, the zeroes of the polynomial x
2
+2x−15 are 3,−5.
Hence a quadratic polynomial has maximum of 2 zeroes.
Let us take an example:
Factorise the quadratic polynomial x
2
+2x−15=0 as shown below:
x
2
+2x−15=0
x
2
+5x−3x−15=0
x(x+5)−3(x+5)=0
x−3=0 or x+5=0
x=3 or x=−5
Therefore, the zeroes of the polynomial x
2
+2x−15 are 3,−5.
Hence a quadratic polynomial has maximum of 2 zeroes.
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