2x^2-11x-21=

Simple and best practice solution for 2x^2-11x-21= 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 2x^2-11x-21= equation:


Simplifying
2x2 + -11x + -21 = 0

Reorder the terms:
-21 + -11x + 2x2 = 0

Solving
-21 + -11x + 2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-3 + -2x)(7 + -1x) = 0

Subproblem 1

Set the factor '(-3 + -2x)' equal to zero and attempt to solve: Simplifying -3 + -2x = 0 Solving -3 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -2x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -2x = 0 + 3 -2x = 0 + 3 Combine like terms: 0 + 3 = 3 -2x = 3 Divide each side by '-2'. x = -1.5 Simplifying x = -1.5

Subproblem 2

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Solution

x = {-1.5, 7}

See similar equations:

| 3x^2-10x+7= | | 6x^2-15x-21= | | x^2+8xy-33y^2= | | x^2+2xy-63y^2= | | x^2+5xy+6y^2= | | 14*4=x | | 14*4=56 | | 3.5x-1=(7x+2) | | 3x^2+x-5=0 | | 3.5x-1=3.5x-1 | | 8+3x=-4(x-2) | | 4+3x=-4(x-1) | | 5x^2+3x=54 | | 4=36x | | -2(x+4)=6x-4 | | x^2-14xy+24xy^2= | | 6x+3=3(x+2) | | x^2-3xy+2y^2= | | -6a=-48 | | 30=8x-6(x+2) | | x^2-14+19=0 | | x^2+13x+12= | | x^2+22x+121= | | x^2-16x+39= | | 2x-14=4x+4 | | 3(2x+3)=15 | | 3x-9=2x+2 | | x^2-15x+56= | | 2x+9=x+6 | | 4900=(x-3)(x) | | x^2-18x+72= | | 3x^2-21x+3=0 |

Equations solver categories