If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-3x(x+4)+7=-9
We move all terms to the left:
-3x(x+4)+7-(-9)=0
We add all the numbers together, and all the variables
-3x(x+4)+16=0
We multiply parentheses
-3x^2-12x+16=0
a = -3; b = -12; c = +16;
Δ = b2-4ac
Δ = -122-4·(-3)·16
Δ = 336
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{336}=\sqrt{16*21}=\sqrt{16}*\sqrt{21}=4\sqrt{21}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-12)-4\sqrt{21}}{2*-3}=\frac{12-4\sqrt{21}}{-6} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-12)+4\sqrt{21}}{2*-3}=\frac{12+4\sqrt{21}}{-6} $
| 56+60+32p=180 | | 5x-39=3(6+8x) | | +10=-x+28 | | 8(h−79)=96 | | 32+8x=4x+4(-4+4x) | | 0.35x=2 | | 1/2(-e)=7/6e | | 8y-3y=40y= | | 7(c-12=-12 | | -2(4r+8)=-13-7r | | 16y-10=12y+50 | | 4×+8y= | | 3(2x1)-2=2(x+7)+1 | | 3(x-30)=x+2 | | -7=3r+14 | | 2+3(4x+5)=5 | | (x+5)-16=-1 | | X4x+8=7x10 | | -9–8n=-73 | | 3(2t-19)=27 | | 44=4k–4 | | 1x-8=13-1x | | 1x(2-6)=9 | | 1x+1x-4=10 | | -10+2x+3(5-x)=1/2(4x-8 | | 16g=4 | | 0.4x-2.5+1.3=3.8+1.3x | | f–8=6+3f | | 3=1.5+x | | 7x²-175=0 | | 6-2=5x+30 | | -(x-7)=5/3=2(x+9) |