29=p*Ip

Solution for 29=p*Ip equation:

29=p*p

We move all terms to the left:

29-(p*p)=0

We add all the numbers together, and all the variables

-(+p*p)+29=0

We get rid of parentheses

-p*p+29=0

Wy multiply elements

-1p^2+29=0

a = -1; b = 0; c = +29;
Δ = b2-4ac
Δ = 02-4·(-1)·29
Δ = 116
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$p_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$p_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{116}=\sqrt{4*29}=\sqrt{4}*\sqrt{29}=2\sqrt{29}$
$p_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-2\sqrt{29}}{2*-1}=\frac{0-2\sqrt{29}}{-2}
=-\frac{2\sqrt{29}}{-2}
=-\frac{\sqrt{29}}{-1}
$
$p_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+2\sqrt{29}}{2*-1}=\frac{0+2\sqrt{29}}{-2}
=\frac{2\sqrt{29}}{-2}
=\frac{\sqrt{29}}{-1}
$