y^2-400=0

Simple and best practice solution for y^2-400=0 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 y^2-400=0 equation: 


Simplifying
y2 + -400 = 0

Reorder the terms:
-400 + y2 = 0

Solving
-400 + y2 = 0

Solving for variable 'y'.

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

Add '400' to each side of the equation.
-400 + 400 + y2 = 0 + 400

Combine like terms: -400 + 400 = 0
0 + y2 = 0 + 400
y2 = 0 + 400

Combine like terms: 0 + 400 = 400
y2 = 400

Simplifying
y2 = 400

Take the square root of each side:
y = {-20, 20}

See similar equations:

| 4y-6=2(6y-15) | | Slope=-3 | | -6=m/10 | | 2x-3003=7827 | | Ax+b=cforx | | K+2=9k-4 | | 3x^2+18=6 | | -19=3v-4 | | .6-.7(2a+3)=4 | | 180=30+9x+(30+x) | | 4x^2+10=90 | | 12x^3-13x-55=0 | | b/4+1/5=13 | | a/3+7=15 | | 2x+(-8)/10 | | 5100/83+51-6-61+64-124 | | (3x^2-13x+14)(x^2-4x+1)=0 | | 5.5-x=-45-x | | s(3s-2)=1 | | 6x^2+22x+18=6+4x | | 7(6-2x)=5(3x+1) | | -3[-c-24]=-3c-24 | | 2*-5+5= | | 5(4-7a)=-a-48 | | 3x^2+18=-6 | | x+7x-2x+9=x+5 | | 4w+8=180 | | 3(5t+1)-15=t-(t+11) | | 54-4x=6 | | 1.17=.5x-.007 | | 16x^2+31x-3=0 | | 10y^2-13yz-3z^2=0 |

Equations solver categories