d^2+18(d+4)=-9

Simple and best practice solution for d^2+18(d+4)=-9 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 d^2+18(d+4)=-9 equation:


Simplifying
d2 + 18(d + 4) = -9

Reorder the terms:
d2 + 18(4 + d) = -9
d2 + (4 * 18 + d * 18) = -9
d2 + (72 + 18d) = -9

Reorder the terms:
72 + 18d + d2 = -9

Solving
72 + 18d + d2 = -9

Solving for variable 'd'.

Reorder the terms:
72 + 9 + 18d + d2 = -9 + 9

Combine like terms: 72 + 9 = 81
81 + 18d + d2 = -9 + 9

Combine like terms: -9 + 9 = 0
81 + 18d + d2 = 0

Factor a trinomial.
(9 + d)(9 + d) = 0

Subproblem 1

Set the factor '(9 + d)' equal to zero and attempt to solve: Simplifying 9 + d = 0 Solving 9 + d = 0 Move all terms containing d to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + d = 0 + -9 Combine like terms: 9 + -9 = 0 0 + d = 0 + -9 d = 0 + -9 Combine like terms: 0 + -9 = -9 d = -9 Simplifying d = -9

Subproblem 2

Set the factor '(9 + d)' equal to zero and attempt to solve: Simplifying 9 + d = 0 Solving 9 + d = 0 Move all terms containing d to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + d = 0 + -9 Combine like terms: 9 + -9 = 0 0 + d = 0 + -9 d = 0 + -9 Combine like terms: 0 + -9 = -9 d = -9 Simplifying d = -9

Solution

d = {-9, -9}

See similar equations:

| s^2-3(s+2)=4 | | 25x^2+80x+64= | | n(n+6)=7 | | w(w+8)=-15 | | (7x+9)-(15x+20)= | | -3(x-2)=2(x+4)-3x | | p(p-4)=32 | | (8x+19)-(6x+11)= | | x(x+17)=-60 | | 2(x-6)=-(12-2x) | | 2s+3(s+1)=6s-9 | | x^2+11x-12=0 | | -4n^2-16n+9= | | 1-6x-28=0 | | z^2-30=z | | 5n-2=5.5 | | p^2+48=-16p | | 2(n-5)=3(n+6) | | d^2+5d=50 | | y-x=14 | | 27x^2+18x^3-24x^4= | | 15x^2+4x-3= | | z+67=133 | | n^2+27=12n | | 16x^2+4xy-30y^2= | | 9x^4y^3-12x^3y^4-3x^3y^3= | | m^2-5m=14 | | 2u-9=7u+15-u-20 | | 4x^2+26x+30= | | 5b+4b+4=8b+2 | | 5b+5b+4=8b+2 | | 4(1-3.5y)+2y=-2 |

Equations solver categories