Compute the zeroes of the polynomial 4x2 – 4x – 8. Also, establish a relationship between the zeroes and coefficients.
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The number of zeroes of a polynomial is equal to the degree of the polynomial, and there is a well-defined mathematical relationship between the zeroes and the coefficients. ... Here, the real number k is said to be a zero of the polynomial of p(x), if p(k) = 0.
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Compute the zeroes of the polynomial 4x2 – 4x – 8. Also, establish a relationship between the zeroes and coefficients.
Answer:
4 {x}^{2} - 4x - 8 = 0 \\ 4( {x}^{2} - x - 2) = 0 \\ {x }^{2} - 2x + x - 2 = 0 \\ x(x - 2) + 1(x - 2) = 0 \\ (x - 2)(x + 1) = 0 \\ x = 2 \: and \: - 1 \\
Sum of roots = - coefficient of x/coefficient of x^2
2+(-1)= - (-4)/4=1
Product of roots = constant /coefficient of x^2
2(-1)=-8/4= -2
Not sure About this answer..
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