2x^2=9/4

Solution for 2x^2=9/4 equation:

2x^2=9/4

We move all terms to the left:

2x^2-(9/4)=0

We add all the numbers together, and all the variables

2x^2-(+9/4)=0

We get rid of parentheses

2x^2-9/4=0

We multiply all the terms by the denominator


2x^2*4-9=0

Wy multiply elements

8x^2-9=0

a = 8; b = 0; c = -9;
Δ = b2-4ac
Δ = 02-4·8·(-9)
Δ = 288
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{288}=\sqrt{144*2}=\sqrt{144}*\sqrt{2}=12\sqrt{2}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-12\sqrt{2}}{2*8}=\frac{0-12\sqrt{2}}{16}
=-\frac{12\sqrt{2}}{16}
=-\frac{3\sqrt{2}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+12\sqrt{2}}{2*8}=\frac{0+12\sqrt{2}}{16}
=\frac{12\sqrt{2}}{16}
=\frac{3\sqrt{2}}{4}
$