Question

6. show that x=(-3) is solution of
${x}^{2} + 6x + 9 = 0$
7. If (x+a) is a factor of
${2x}^{2} + 2ax + 5x + 10$
Find a.
8. Give an example of polynomials f(x), g(x) 9(x) and r(x) satisfying f(x) = g(x). q(x) + r(x) where deg r(x) =0
9. It two zeres of polynomial
${x}^{3} - {4x}^{2} - 3x + 12$
are
$\sqrt{3}$
and
$\sqrt{ - 3}$
then find its third zero.

10. If (-1) and 2 are two zeroes of polynomial
${2x}^{3} - {x}^{2} - 5x - 2$ then find its third zero.
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Answer 1

Answer:

I hope you could understand it and can solve your problem.