x^2-2=-7x/2

Solution for x^2-2=-7x/2 equation:

x^2-2=-7x/2

We move all terms to the left:

x^2-2-(-7x/2)=0

We get rid of parentheses

x^2+7x/2-2=0

We multiply all the terms by the denominator


x^2*2+7x-2*2=0

We add all the numbers together, and all the variables

x^2*2+7x-4=0

Wy multiply elements

2x^2+7x-4=0

a = 2; b = 7; c = -4;
Δ = b2-4ac
Δ = 72-4·2·(-4)
Δ = 81
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{81}=9$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-9}{2*2}=\frac{-16}{4}
=-4
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+9}{2*2}=\frac{2}{4}
=1/2
$