(n+5)(n+9)=4

Simple and best practice solution for (n+5)(n+9)=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 (n+5)(n+9)=4 equation:


Simplifying
(n + 5)(n + 9) = 4

Reorder the terms:
(5 + n)(n + 9) = 4

Reorder the terms:
(5 + n)(9 + n) = 4

Multiply (5 + n) * (9 + n)
(5(9 + n) + n(9 + n)) = 4
((9 * 5 + n * 5) + n(9 + n)) = 4
((45 + 5n) + n(9 + n)) = 4
(45 + 5n + (9 * n + n * n)) = 4
(45 + 5n + (9n + n2)) = 4

Combine like terms: 5n + 9n = 14n
(45 + 14n + n2) = 4

Solving
45 + 14n + n2 = 4

Solving for variable 'n'.

Reorder the terms:
45 + -4 + 14n + n2 = 4 + -4

Combine like terms: 45 + -4 = 41
41 + 14n + n2 = 4 + -4

Combine like terms: 4 + -4 = 0
41 + 14n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-41' to each side of the equation.
41 + 14n + -41 + n2 = 0 + -41

Reorder the terms:
41 + -41 + 14n + n2 = 0 + -41

Combine like terms: 41 + -41 = 0
0 + 14n + n2 = 0 + -41
14n + n2 = 0 + -41

Combine like terms: 0 + -41 = -41
14n + n2 = -41

The n term is 14n.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14n + 49 + n2 = -41 + 49

Reorder the terms:
49 + 14n + n2 = -41 + 49

Combine like terms: -41 + 49 = 8
49 + 14n + n2 = 8

Factor a perfect square on the left side:
(n + 7)(n + 7) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(n + 7) equal to 2.828427125 and -2.828427125.

Subproblem 1

n + 7 = 2.828427125 Simplifying n + 7 = 2.828427125 Reorder the terms: 7 + n = 2.828427125 Solving 7 + n = 2.828427125 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + n = 2.828427125 + -7 Combine like terms: 7 + -7 = 0 0 + n = 2.828427125 + -7 n = 2.828427125 + -7 Combine like terms: 2.828427125 + -7 = -4.171572875 n = -4.171572875 Simplifying n = -4.171572875

Subproblem 2

n + 7 = -2.828427125 Simplifying n + 7 = -2.828427125 Reorder the terms: 7 + n = -2.828427125 Solving 7 + n = -2.828427125 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + n = -2.828427125 + -7 Combine like terms: 7 + -7 = 0 0 + n = -2.828427125 + -7 n = -2.828427125 + -7 Combine like terms: -2.828427125 + -7 = -9.828427125 n = -9.828427125 Simplifying n = -9.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. n = {-4.171572875, -9.828427125}

See similar equations:

| 25x-7-17x+3=21x-3-13x+14 | | f(-6)=x-2 | | (3x+2)(9x^2+12x+4)=0 | | 5u/4-3=7u/6 | | Graphx=5y+4 | | f(-1)=x+3 | | X^3+9x^2-70=0 | | X=6x-28 | | f(-3)=x+3 | | 3+2(x+1)=73 | | 3ax+11=7-8x | | 8x+12=45-3x | | F(0)=0.41ln(x+1)+28 | | F(2)=2x+5 | | x^2(7x^3-2y^2)+(x^4-7)= | | m+k-3n=36 | | 6+x^2=-6x | | (3-x)/10=73 | | f(-2)=2x+5 | | mx^2+(m-5)x-20=0 | | 12(x+8)=80 | | 2x^2-1x+15=0 | | -16(x+4)=68 | | -10(x+4)=-64 | | ln(8x+24)=ln(6x+24) | | m+k=6n | | (7+2j)(7+j)= | | 2kx^2-4kx+4k=4x-7 | | x+y+90=180 | | 2/15=x/27 | | y+5(y-3)= | | 3-x=0.003 |

Equations solver categories