4x2+5=9

Simple and best practice solution for 4x2+5=9 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 4x2+5=9 equation:



4x^2+5=9
We move all terms to the left:
4x^2+5-(9)=0
We add all the numbers together, and all the variables
4x^2-4=0
a = 4; b = 0; c = -4;
Δ = b2-4ac
Δ = 02-4·4·(-4)
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-8}{2*4}=\frac{-8}{8} =-1 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+8}{2*4}=\frac{8}{8} =1 $

See similar equations:

| 4x+12=2005 | | 2.1=f-7.5 | | 14x-13x+3x-2x=10 | | p^2-40=-3p | | −3x+4*6=14 | | 5-(5x-6)=-37 | | O.6(2h-4)=2.4+1.2h | | r/2=2.56 | | 5(8j-10)=5(7j+5) | | 0x+2=1x=3 | | 5-3(w-2)=-1 | | 1/3t-5=2 | | 2-x/2=2/3(x+3/2) | | Y=18/4x+4 | | -4(3x+12)=72 | | u=4+-2 | | 25x^2+6=31 | | 4x+2(2x-3)=58 | | x+3/4=-15/4x-33/32 | | 5x-8=4x+47 | | 8=4/7s | | 4n^2-36n=-56 | | 1/2x+1/2=3x | | 5-7x=24 | | 5(2x)-3=15x-5 | | 2x-4/4=4x-3/3 | | 6x^2+12x-447=0 | | 3/2x+1/6(x-1)=4 | | -5(3x-17)=2(x-2)-13 | | 1/2(4x-9)=2x+7 | | x*(x*0.15)=50 | | 7(1-y)=-3(y-2 |

Equations solver categories