If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2x^2+12x+36=21
We move all terms to the left:
2x^2+12x+36-(21)=0
We add all the numbers together, and all the variables
2x^2+12x+15=0
a = 2; b = 12; c = +15;
Δ = b2-4ac
Δ = 122-4·2·15
Δ = 24
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{24}=\sqrt{4*6}=\sqrt{4}*\sqrt{6}=2\sqrt{6}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(12)-2\sqrt{6}}{2*2}=\frac{-12-2\sqrt{6}}{4} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(12)+2\sqrt{6}}{2*2}=\frac{-12+2\sqrt{6}}{4} $
| 2d^2=–40 | | 7=(4/3)(x+6) | | 32-12=b-7 | | 2(4c+1)+7(c+8=-32 | | 6f^2+20f-896=0 | | 2(4-6x)=8x-8(3x+7) | | 5s+6=-5(s+2) | | -6+4(1+3x)=-5(-3+x) | | g/2+4=12 | | 3/4g-32=73 | | L=11x/3 | | 23=s/13 | | 4(x+12)=7+7x | | 5x-1.6=xç | | 15k=3k+36 | | 23=s/12 | | 8(x-2)=2x-2(x-8) | | 14=g/2 | | -23=m+(-1) | | -14=3a-5 | | A=-3(a)-12 | | 6.4g+8=3.4g+17 | | -2(1-4v)+4=-2(-3v+7)+6 | | 4.5-1.5=x | | 5c=40-30 | | 3.2d=40. | | (3x-6)=(-5x+18) | | 3/7=36/n;n= | | -20s=-880 | | -2(1-4v)+4=-2(3v+7)+6 | | 5s+6=21 | | 8x=+5x=90 |