if x -2 is a factor of x cube - 3x + 5a then value of a is:
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x-2 is a factor so x-2=0 x=2 substitute in that equation x^3-3x+5a=0
2^3-3×2+5a=0
8-6+5a=0
a=-2/5
2^3-3×2+5a=0
8-6+5a=0
a=-2/5
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HEY THERE!!
Question;-
if x -2 is a factor of x cube - 3x + 5a then value of a is:
Method of Solution;-
Given Polynomial;-
x³-3x+5a
Also, their Factor (x-2).
f(x)=x-2
x-2=0
•°• x=2
Now, solving the Factor of Polytechnic x³-3x+5a
Considering on Question!-
Substitute the value of x in Equation.
F(x)=x³-3x+5a=0
f(2)=(2)³-3(2)+5a=0
8-6+5a=0
2+5a=0
°•° 5a=-2
a=-2/5
Hence, value of x³-3x+5a ,a=-2/5
Question;-
if x -2 is a factor of x cube - 3x + 5a then value of a is:
Method of Solution;-
Given Polynomial;-
x³-3x+5a
Also, their Factor (x-2).
f(x)=x-2
x-2=0
•°• x=2
Now, solving the Factor of Polytechnic x³-3x+5a
Considering on Question!-
Substitute the value of x in Equation.
F(x)=x³-3x+5a=0
f(2)=(2)³-3(2)+5a=0
8-6+5a=0
2+5a=0
°•° 5a=-2
a=-2/5
Hence, value of x³-3x+5a ,a=-2/5
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