4x^2-15x-3=0

Simple and best practice solution for 4x^2-15x-3=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 4x^2-15x-3=0 equation:


Simplifying
4x2 + -15x + -3 = 0

Reorder the terms:
-3 + -15x + 4x2 = 0

Solving
-3 + -15x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-0.75 + -3.75x + x2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + -3.75x + 0.75 + x2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + -3.75x + x2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + -3.75x + x2 = 0 + 0.75
-3.75x + x2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
-3.75x + x2 = 0.75

The x term is -3.75x.  Take half its coefficient (-1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
-3.75x + 3.515625 + x2 = 0.75 + 3.515625

Reorder the terms:
3.515625 + -3.75x + x2 = 0.75 + 3.515625

Combine like terms: 0.75 + 3.515625 = 4.265625
3.515625 + -3.75x + x2 = 4.265625

Factor a perfect square on the left side:
(x + -1.875)(x + -1.875) = 4.265625

Calculate the square root of the right side: 2.065338955

Break this problem into two subproblems by setting 
(x + -1.875) equal to 2.065338955 and -2.065338955.

Subproblem 1

x + -1.875 = 2.065338955 Simplifying x + -1.875 = 2.065338955 Reorder the terms: -1.875 + x = 2.065338955 Solving -1.875 + x = 2.065338955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + x = 2.065338955 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + x = 2.065338955 + 1.875 x = 2.065338955 + 1.875 Combine like terms: 2.065338955 + 1.875 = 3.940338955 x = 3.940338955 Simplifying x = 3.940338955

Subproblem 2

x + -1.875 = -2.065338955 Simplifying x + -1.875 = -2.065338955 Reorder the terms: -1.875 + x = -2.065338955 Solving -1.875 + x = -2.065338955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + x = -2.065338955 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + x = -2.065338955 + 1.875 x = -2.065338955 + 1.875 Combine like terms: -2.065338955 + 1.875 = -0.190338955 x = -0.190338955 Simplifying x = -0.190338955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.940338955, -0.190338955}

See similar equations:

| 14y+5y-2y+18=120 | | 5x^2+40x-80=0 | | 3z+4z-3+3z+4z-3=162 | | 0.4+3(2x-2)=4.4 | | 4(3-2x)+9x=6 | | -2x-5=5x+7 | | 7[x-2]=5[x+2] | | 1.6q-2.2-4.6q=-4.0q-3.4 | | 3z+4z-3+3z+4z-3= | | 2[c-3]=76 | | 58-5x=4x+21 | | wv-9v+wk-9k= | | 8-9x=123-44x | | 11v+2v=65 | | -4x-9=-53 | | 9/7*2= | | 5(w+6)+2w= | | 3x-3=-6x-6 | | 36(37-4.5x)=14(4x-9)+41.0 | | 4x-8=4x+8 | | 60x^3-60x=0 | | 2(4y-4.3)+7.8=8(6y-0.1) | | -3x-2x=8-10x | | 6(x-4)-8=4x+6 | | P^2+3pq-28q^2=0 | | a^4-9a^2+14=0 | | 4x+2=8-4x | | -108=8x | | -6x+3=-6-3x | | 5n+30=60 | | -11.07-0.5c=6.9(c+2.9) | | 384r^2-150= |

Equations solver categories