Activity 2: Finding the Number of Roots of Polynomial Equations
Some polynomial equations are given below. Complete the table and answer
the questions that follow. (If a root occurs twice, count it twice; if thrice, count
it three times, and so on. The first one is done for you)
Real Roots of Number of
Polynomial Equation Degree an Equation Real Roots
1. $\left(x+1\right)^{2}\left(x-5\right)=0$ $-1$ $\left(2$ times); 5
$2$ $x-8=0$
3. $\left(x+2\right)\left(x-2\right)=0$
4. $\left(x-3\right)\left(x+1\right)\left(x-1\right)=0$
$5$ $x\left(x-4\right)\left(x+5\right)\left(x-1\right)=0$
$6.$ $\left(x-1\right)\left(x-3\right)^{3}=0$
$7$ $\left(x^{2}-4x+13\right)\left(x-5\right)^{3}=0$
$8$ $\left(x+1\right)^{5}\left(x-1\right)^{2}=0$
$9$ $\left(x^{2}+4\right)\left(x-3\right)^{3}=0$
$10.\left(x-\sqrt{2} \right)^{6}\left(x+\sqrt{2} \right)^{6}x^{4}=0$