If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(x+9)(x+15)=270
We move all terms to the left:
(x+9)(x+15)-(270)=0
We multiply parentheses ..
(+x^2+15x+9x+135)-270=0
We get rid of parentheses
x^2+15x+9x+135-270=0
We add all the numbers together, and all the variables
x^2+24x-135=0
a = 1; b = 24; c = -135;
Δ = b2-4ac
Δ = 242-4·1·(-135)
Δ = 1116
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{1116}=\sqrt{36*31}=\sqrt{36}*\sqrt{31}=6\sqrt{31}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(24)-6\sqrt{31}}{2*1}=\frac{-24-6\sqrt{31}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(24)+6\sqrt{31}}{2*1}=\frac{-24+6\sqrt{31}}{2} $
| -51-10x=68-3x | | -72=-4(n+6) | | 2/3g=10 | | -3r+12=0 | | 3x+4=4(x+15) | | 2y+6.4=-10 | | 10t–9t–1=15 | | 500=15x+.05 | | 16-(q)=83 | | 2•k•2.6=12 | | 8x+2-3=4(2x-1) | | 9x-1=6x=16 | | 3.7×b=0.0333 | | 2x-16+100=180 | | 20+4x=10+6x | | |x-9|+10=20 | | 4(y+4)+y=2(y+4)+2 | | (N+2)(n+5)=4 | | 128=-2(-8x-8) | | 16=50(7x-6) | | x^2-13-48=0 | | -5-x/6=-9 | | 2x-5=2(x-1) | | 13=1/4(2x+16) | | -9w-5=27 | | 2/3=-1/3(-5x-6) | | -7-4u-I=1 | | 1/2y+1/4-2=-10 | | x-1÷3=3x-7÷5 | | -3x+7x-74=70 | | L-3=24/2l | | x–8=4–2x |