20y^2-13y-21=0

Simple and best practice solution for 20y^2-13y-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 20y^2-13y-21=0 equation:


Simplifying
20y2 + -13y + -21 = 0

Reorder the terms:
-21 + -13y + 20y2 = 0

Solving
-21 + -13y + 20y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-3 + -4y)(7 + -5y) = 0

Subproblem 1

Set the factor '(-3 + -4y)' equal to zero and attempt to solve: Simplifying -3 + -4y = 0 Solving -3 + -4y = 0 Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -4y = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4y = 0 + 3 -4y = 0 + 3 Combine like terms: 0 + 3 = 3 -4y = 3 Divide each side by '-4'. y = -0.75 Simplifying y = -0.75

Subproblem 2

Set the factor '(7 + -5y)' equal to zero and attempt to solve: Simplifying 7 + -5y = 0 Solving 7 + -5y = 0 Move all terms containing y to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -5y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -5y = 0 + -7 -5y = 0 + -7 Combine like terms: 0 + -7 = -7 -5y = -7 Divide each side by '-5'. y = 1.4 Simplifying y = 1.4

Solution

y = {-0.75, 1.4}

See similar equations:

| 2a^2-11a+12= | | -7(-4u+y-3)= | | 12+4=16 | | 21x^2-37x+12=0 | | 48.3x+18.7-12.4x-20.4= | | (x+5)(x+5)=(x+4)(x+4) | | (2x+3)(2x+3)+49=0 | | 6x^3-9x^2+4x-6=0 | | 9(y-2)= | | 3w+20=4w+7 | | 5(z+1)= | | x-5y= | | 54/x=50/100 | | 12-5x^2=12 | | 55+6y=-37 | | 2/3-6=2 | | 3x+17y-2z=3y-17x+2z | | 25x^4-40x^3+16x^2=0 | | 6x(-5+2x)=0 | | x^6=6x^3+16 | | 15x-4+6x-10= | | 3x+2y=11y+2x | | 5(x+1)+6(x+5)= | | 5x-9=2x+18 | | 7x^8-42x^6=0 | | 9/x=24/x-5 | | x+14/x-3=-1/2 | | -x/-1 | | 45=5/9(F-32) | | (5u^3+4u^2)+(35u+28)=0 | | -2+(9-k)=-(7+k) | | 22x^12-33x^7/11x^3 |

Equations solver categories