Question

If one zero of the quadratic polynomial 2x^3-3x+p is 3 find its other zero.Also find the value of p

Answer 1

2x³-3x +pis a quadratic polynomial
then it's one zero is 3
put 3 in place of x get the value of p
2(3)³-3(3)+p =0
2(27)-9+p=0
54-9+p=0
45+p = 0
p=-45
then the resulting equation is 2x³-3x-45
the zeroes of the equation are and 3

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