If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-4x(9+x)=-16
We move all terms to the left:
-4x(9+x)-(-16)=0
We add all the numbers together, and all the variables
-4x(x+9)-(-16)=0
We add all the numbers together, and all the variables
-4x(x+9)+16=0
We multiply parentheses
-4x^2-36x+16=0
a = -4; b = -36; c = +16;
Δ = b2-4ac
Δ = -362-4·(-4)·16
Δ = 1552
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{1552}=\sqrt{16*97}=\sqrt{16}*\sqrt{97}=4\sqrt{97}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-36)-4\sqrt{97}}{2*-4}=\frac{36-4\sqrt{97}}{-8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-36)+4\sqrt{97}}{2*-4}=\frac{36+4\sqrt{97}}{-8} $
| 15x+4=5x+4 | | -18+x=-27 | | 8/10=3/x | | 5x-(x+10)=3(x+6) | | -16x+2+2x+5=-57 | | 12x2-11x-6=0 | | (4x+22)=(10x-10) | | -0.5(0.3x-0.6=-1.5 | | b+2=21 | | 3x-9-2x-4=-21 | | 45x=590x | | 4(3-b)-32=26b-5(4+6b) | | –8=3+4b–8–5b | | 4k2-8k+4=0 | | 4(3-b)-32=26b-5(4+ | | 3(x+0.2)=-4(2.06-x) | | 7/8-8x=-8x+1/8 | | 4.5(8–x)+36=102–2.5(3x+24) | | 8-8c=35 | | 2/3-3/2y+1/3y=-4 | | 6.15(x–8.86)=21.83 | | 2x^2=86,2 | | –2=2+5b–2–6b | | 11b2+7b-11=0 | | m-26=73 | | 4^x-1=20 | | x/8-2=7/8 | | 49y=6(8y-2)= | | v-3=-23 | | 18=y/3-13 | | 5(y+8)=5(y-4) | | 4(m+2)+m=22+2m |