if x=2 and x= 0 are roots of the polynomial f(x)= 2x3- 5x2 +ax+b . find the value of and b .
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Answered by
17
Hey dear!
Here is yr answer......
= 2x³ -5x² + ax + b
x = 0
2(0)³ - 5(0)³ + a(0) + b = 0
b = 0
x = 2
2(2)³ - 5(2)² + a(2) + b = 0
2(8) - 5(4) + 2a + 0 = 0
16 -20 + 2a = 0
-4 + 2a = 0
2a = 4
a = 4/2
a = 2
Therefore,
a = 2 , b = 0
Hope it hlpz...
Here is yr answer......
= 2x³ -5x² + ax + b
x = 0
2(0)³ - 5(0)³ + a(0) + b = 0
b = 0
x = 2
2(2)³ - 5(2)² + a(2) + b = 0
2(8) - 5(4) + 2a + 0 = 0
16 -20 + 2a = 0
-4 + 2a = 0
2a = 4
a = 4/2
a = 2
Therefore,
a = 2 , b = 0
Hope it hlpz...
harrymehra14:
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3
Answer:
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