(5y*5y)=45

Solution for (5y*5y)=45 equation:

(5y*5y)=45

We move all terms to the left:

(5y*5y)-(45)=0

We add all the numbers together, and all the variables

(+5y*5y)-45=0

We get rid of parentheses

5y*5y-45=0

Wy multiply elements

25y^2-45=0

a = 25; b = 0; c = -45;
Δ = b2-4ac
Δ = 02-4·25·(-45)
Δ = 4500
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{4500}=\sqrt{900*5}=\sqrt{900}*\sqrt{5}=30\sqrt{5}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-30\sqrt{5}}{2*25}=\frac{0-30\sqrt{5}}{50}
=-\frac{30\sqrt{5}}{50}
=-\frac{3\sqrt{5}}{5}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+30\sqrt{5}}{2*25}=\frac{0+30\sqrt{5}}{50}
=\frac{30\sqrt{5}}{50}
=\frac{3\sqrt{5}}{5}
$