if x+a is a zero of the polynomial 2xsquare+3ax+1, find the value of a
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Solution :
Let p(x) = 2x²+3ax+1
if x + a is a zero of p(x) then
p(-a) = 0
=> 2(-a)² + 3a(-a)+1 = 0
=> 2a²-3a² = -1
=> -a² = -1
=> a² = 1
=> a = ± 1
•••••
Let p(x) = 2x²+3ax+1
if x + a is a zero of p(x) then
p(-a) = 0
=> 2(-a)² + 3a(-a)+1 = 0
=> 2a²-3a² = -1
=> -a² = -1
=> a² = 1
=> a = ± 1
•••••
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12
hey mate here is your answer in the pic
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hope it helps you
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