15x^2+28x+8=-4

Simple and best practice solution for 15x^2+28x+8=-4 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 15x^2+28x+8=-4 equation:


Simplifying
15x2 + 28x + 8 = -4

Reorder the terms:
8 + 28x + 15x2 = -4

Solving
8 + 28x + 15x2 = -4

Solving for variable 'x'.

Reorder the terms:
8 + 4 + 28x + 15x2 = -4 + 4

Combine like terms: 8 + 4 = 12
12 + 28x + 15x2 = -4 + 4

Combine like terms: -4 + 4 = 0
12 + 28x + 15x2 = 0

Factor a trinomial.
(6 + 5x)(2 + 3x) = 0

Subproblem 1

Set the factor '(6 + 5x)' equal to zero and attempt to solve: Simplifying 6 + 5x = 0 Solving 6 + 5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 5x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + 5x = 0 + -6 5x = 0 + -6 Combine like terms: 0 + -6 = -6 5x = -6 Divide each side by '5'. x = -1.2 Simplifying x = -1.2

Subproblem 2

Set the factor '(2 + 3x)' equal to zero and attempt to solve: Simplifying 2 + 3x = 0 Solving 2 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3x = 0 + -2 3x = 0 + -2 Combine like terms: 0 + -2 = -2 3x = -2 Divide each side by '3'. x = -0.6666666667 Simplifying x = -0.6666666667

Solution

x = {-1.2, -0.6666666667}

See similar equations:

| 2x-y+z=9 | | (5y-4)(5-y)=0 | | 3e^5x=8 | | -36x^2+16x=0 | | 4a-10=14 | | 9p^2+8=89 | | 6g+2(-5+3x)=1-x | | 88=4(3n-2) | | 8r^2-3=5 | | 3-5p^2=-317 | | 50=30 | | 3-5p^2=5 | | 5sin(3x)= | | -3x=2x-3 | | -4(2x+4)-4=-5(x+5)+2x | | 4n^2-10=317 | | 6x+2(-5+3x)=1-x | | 3-38=12 | | 2p^2+5=167 | | -48+69x=-30x^2+7x | | 6(d+6)=4(d-6)-2d | | 3r^2+7=82 | | 2x+3.5=0 | | 6(d+6)=4(d+6)-d | | f(x)=3x(9x^2+18x+8) | | 2r^2+4=12 | | -39(x-4)=x+8 | | x+x*2-15=25 | | 10x^2+1=1001 | | x+x*2-10=25 | | 4x+5=-.33*x-8 | | 4a+8=16 |

Equations solver categories