3.5*3.5=2x*2x

Solution for 3.5*3.5=2x*2x equation:

3.5*3.5=2x*2x

We move all terms to the left:

3.5*3.5-(2x*2x)=0

We add all the numbers together, and all the variables

-(+2x*2x)+3.5*3.5=0

We add all the numbers together, and all the variables

-(+2x*2x)+12.25=0

We get rid of parentheses

-2x*2x+12.25=0

Wy multiply elements

-4x^2+12.25=0

a = -4; b = 0; c = +12.25;
Δ = b2-4ac
Δ = 02-4·(-4)·12.25
Δ = 196
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{196}=14$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-14}{2*-4}=\frac{-14}{-8}
=1+3/4
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+14}{2*-4}=\frac{14}{-8}
=-1+3/4
$