If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(15+2x)(12+2x)=225
We move all terms to the left:
(15+2x)(12+2x)-(225)=0
We add all the numbers together, and all the variables
(2x+15)(2x+12)-225=0
We multiply parentheses ..
(+4x^2+24x+30x+180)-225=0
We get rid of parentheses
4x^2+24x+30x+180-225=0
We add all the numbers together, and all the variables
4x^2+54x-45=0
a = 4; b = 54; c = -45;
Δ = b2-4ac
Δ = 542-4·4·(-45)
Δ = 3636
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{3636}=\sqrt{36*101}=\sqrt{36}*\sqrt{101}=6\sqrt{101}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(54)-6\sqrt{101}}{2*4}=\frac{-54-6\sqrt{101}}{8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(54)+6\sqrt{101}}{2*4}=\frac{-54+6\sqrt{101}}{8} $
| 2c+2=54 | | 300d-40=140 | | 5.7a+1.2=6.3a+5.4 | | 5/2c=(8)1/3 | | 5x-5/6+2=10 | | x+1,6=0,8 | | x+4/2=21/12 | | -1/9(x-27)+(x+3)=x-17 | | -7(-6y-20)+8y=-10 | | 60=2x+2(2x) | | 3x+13=5x-10 | | 6a=-4+2=3a+1 | | 19/y+8/y=3 | | 26h=264 | | 240.35=(x+8.30+3.80)19 | | x+11=5x-9=2x+10 | | 18X+21y=120 | | y-3=-1+4 | | 26+h=264 | | 6n+5=10 | | 0.5m-4.9=2.6 | | x+4x/2=252 | | 280(370-w)+135w=83,300 | | 34x=139 | | 0.2x+5.7=9.3 | | (3x-3=147 | | 3(x+9)=5(x+7)+4 | | 5x+14+2x+50=180 | | 28=15+2(7x-2x) | | 15=1/3x+3 | | 46=-6t-9 | | x=11.3+(-1.645)(2) |