4y^2-11y+21=0

Simple and best practice solution for 4y^2-11y+21=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 4y^2-11y+21=0 equation:


Simplifying
4y2 + -11y + 21 = 0

Reorder the terms:
21 + -11y + 4y2 = 0

Solving
21 + -11y + 4y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
5.25 + -2.75y + y2 = 0

Move the constant term to the right:

Add '-5.25' to each side of the equation.
5.25 + -2.75y + -5.25 + y2 = 0 + -5.25

Reorder the terms:
5.25 + -5.25 + -2.75y + y2 = 0 + -5.25

Combine like terms: 5.25 + -5.25 = 0.00
0.00 + -2.75y + y2 = 0 + -5.25
-2.75y + y2 = 0 + -5.25

Combine like terms: 0 + -5.25 = -5.25
-2.75y + y2 = -5.25

The y term is -2.75y.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75y + 1.890625 + y2 = -5.25 + 1.890625

Reorder the terms:
1.890625 + -2.75y + y2 = -5.25 + 1.890625

Combine like terms: -5.25 + 1.890625 = -3.359375
1.890625 + -2.75y + y2 = -3.359375

Factor a perfect square on the left side:
(y + -1.375)(y + -1.375) = -3.359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 7p-(3p+4)=2(2p-1)-2 | | -6x-y=4 | | 13-ax=1-x | | 5x/12-4x/18 | | 22+-8x=4+-2x | | f(x)=2x^2-16x+29 | | h=288-16t^2 | | 18+6x=4y+16 | | 8b-6=-22 | | c=5f/9-32 | | 3(7x+4)=30-3x | | 7=-15-2y | | 15x+7th=80 | | 4x-18=-38-3x | | 8(0.04m+26.90+0.10(26.90))=260.40 | | 8b-6=-22 | | 7.91x+79.1=158.2 | | 2.5+10m=7.87 | | 2y+36=4y-15 | | 24=4(5x+2) | | x=x^2+18x+84 | | 26-4y=-2x | | 3x+17=3x-2 | | 33=3.3x | | -14+8x=-8+5x | | 6(.07m+24.90+.30(24.90))=225.30 | | Log(6)(5x+21)-log(6)(x+3)=1 | | (d+2)-7= | | X(x-3)=-7-10x | | 0.75x-18=0.25-4 | | X^2+18x+9=162 | | 704=16(x+4) |

Equations solver categories