1.4=x*x/1.5

Solution for 1.4=x*x/1.5 equation:

1.4=x*x/1.5

We move all terms to the left:

1.4-(x*x/1.5)=0

We add all the numbers together, and all the variables

-(+x*x/1.5)+1.4=0

We get rid of parentheses

-x*x/1.5+1.4=0

We multiply all the terms by the denominator


-x*x+(1.4)*1.5=0

We add all the numbers together, and all the variables

-x*x+2.1=0

Wy multiply elements

-1x^2+2.1=0

a = -1; b = 0; c = +2.1;
Δ = b2-4ac
Δ = 02-4·(-1)·2.1
Δ = 8.4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{8.4}}{2*-1}=\frac{0-\sqrt{8.4}}{-2}
=-\frac{\sqrt{}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{8.4}}{2*-1}=\frac{0+\sqrt{8.4}}{-2}
=\frac{\sqrt{}}{-2}
$