Solve the cubic equation

(a) If $a^{3}+b^{3}=9$ and $a+b=3$ find ab. 
(b) If $x+y=5$ and $4xy=21,$ find $x^{3}+y^{3}$ 
(c) If $a-b=-1$ and $ab=-12,$ find $a^{3}-b^{3}$ 
(d) If $x^{2}+y^{2}=13$ and $xy=6,$ find $x^{3}+y^{3}$ 
(e) If $a-b=-2$ and $a^{3}-b^{3}=-26$ find ab. 
$\left(t\right)$ If $p^{2}+q^{2}=5$ and pq $=2$ find $p^{3}$ $3$ $a$ 

$\left(a\right)$ $1fa^{3}+b^{3}=9$ and $a+b=3$ find ab. 
(b) If $x+y=5$ and $4xy=21$ find $x^{3}+y^{3}$ 
(c) If $a-b=-1$ and $ab=-12$ find $a^{3}-b^{3}$ 
$\left(d\right)$ If $x^{2}+y^{2}=13$ and $xy=6$ find $x^{3}+y^{3}$ 
(e) If $a-b=-2$ and $a^{3}-b^{3}=-26,$ find ab. 
(f) If $p^{2}+q^{2}=5$ and $pq=2$ find $p^{3}-9^{3}$ 

6. (a) If $a^{3}+b^{3}=9$ and $a+b=3$ find ab. 
fo If $x+y=5$ and $4xy=21,$ find $x^{3}+y^{3}$ y°. 
$δ$ If $a-b=-1$ and $ab=-12$ find $a^{3}-b^{3}$ b6³3. . 
$C$ If $x^{2}+y^{2}=13$ and $xy=6$ find $x^{3}+y^{3}$ 
(e) If $a-b=-2$ and $a^{3}-b^{3}=-26$ find ab. 
If $p^{2}+q^{2}=5$ and $pq=2$ find p³ - q°. 

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