4x^2-5=20

Simple and best practice solution for 4x^2-5=20 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 4x^2-5=20 equation: 


Simplifying
4x2 + -5 = 20

Reorder the terms:
-5 + 4x2 = 20

Solving
-5 + 4x2 = 20

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '5' to each side of the equation.
-5 + 5 + 4x2 = 20 + 5

Combine like terms: -5 + 5 = 0
0 + 4x2 = 20 + 5
4x2 = 20 + 5

Combine like terms: 20 + 5 = 25
4x2 = 25

Divide each side by '4'.
x2 = 6.25

Simplifying
x2 = 6.25

Take the square root of each side:
x = {-2.5, 2.5}

See similar equations:

| -12.5+0.5x=-12.5 | | 9w=21.6 | | 3w+9=39 | | 10-4+30=3x+9x | | X^3(x^4y^3)= | | y=8lnx | | (3s^3t^2)(-4s^3t^2)= | | -4.00x-5.00=-53 | | 17x+6=138 | | z^2+(4-6i)z-4-12i=0 | | -4.00-5.00=-53 | | 2x-8=8x | | 5x+3x+x=9 | | 2y+4(y-2)=4 | | 0.6(x+90)+0.4x=79 | | (-3mn^2)(5m^3n^2)= | | -4-5=-53 | | 50+100= | | (Bc^3)(b^4c^3)= | | 12x-2=8x+4 | | 21n(3x)+1=5 | | 12y+2=46 | | 55x+58x=339 | | 21n(3x)=5 | | 7.3=9.1-0.6x | | (X^3y^4)(xy^3)= | | -250.00-5.00x=0 | | 3x-3=18x+2 | | (r^3t^4)(r^4t^4)= | | 8.7m=65.1 | | 8h-19=37 | | 3x^4-16x^3+18x^2-5=0 |

Equations solver categories