((x+4)(x+4))=9

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



((x+4)(x+4))=9
We move all terms to the left:
((x+4)(x+4))-(9)=0
We multiply parentheses ..
((+x^2+4x+4x+16))-9=0
We calculate terms in parentheses: +((+x^2+4x+4x+16)), so:
(+x^2+4x+4x+16)
We get rid of parentheses
x^2+4x+4x+16
We add all the numbers together, and all the variables
x^2+8x+16
Back to the equation:
+(x^2+8x+16)
We get rid of parentheses
x^2+8x+16-9=0
We add all the numbers together, and all the variables
x^2+8x+7=0
a = 1; b = 8; c = +7;
Δ = b2-4ac
Δ = 82-4·1·7
Δ = 36
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{36}=6$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-6}{2*1}=\frac{-14}{2} =-7 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+6}{2*1}=\frac{-2}{2} =-1 $

See similar equations:

| -21/d=-7 | | 32=4(7x+8) | | 0.6y+0.3=4.5 | | 3n-2=-12+5n | | a/6-3/6=2/6 | | 60=2x-6 | | 80=m+54 | | 13w-18=7w+5 | | 9v+14v+15v+–19v=19 | | -5(5v+5)=-5(v-3) | | 6d/2=-7 | | 48=6(m-76) | | 2(3y+10)=30 | | 5n-5=3+3n | | -2x2-2x+1=0 | | -2/5c+-2=9 | | a/3-3/6=1/3 | | 59-y=272 | | 2.7c-45=3.6c-9 | | 14x−24= | | −2x+8=(0.25)x | | 1.4x+0.52=1.7x-0.5 | | 16-7v=2 | | z×4=40 | | -3y+4=-4(-9y+10) | | 2x+20+2x=60 | | 9/10x=6/25/ | | 6x+10+2x=42 | | 8/3=10/n | | 3(5x-3)=4(3x= | | 3(5x-3)=4(3x | | 13=5y-79 |

Equations solver categories