b*b=16/121

Solution for b*b=16/121 equation:

b*b=16/121

We move all terms to the left:

b*b-(16/121)=0

We add all the numbers together, and all the variables

b*b-(+16/121)=0

Wy multiply elements

b^2-(+16/121)=0

We get rid of parentheses

b^2-16/121=0

We multiply all the terms by the denominator


b^2*121-16=0

Wy multiply elements

121b^2-16=0

a = 121; b = 0; c = -16;
Δ = b2-4ac
Δ = 02-4·121·(-16)
Δ = 7744
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{7744}=88$
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-88}{2*121}=\frac{-88}{242}
=-4/11
$
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+88}{2*121}=\frac{88}{242}
=4/11
$