If it's not what You are looking for type in the equation solver your own equation and let us solve it.
9x^2+17=21
We move all terms to the left:
9x^2+17-(21)=0
We add all the numbers together, and all the variables
9x^2-4=0
a = 9; b = 0; c = -4;
Δ = b2-4ac
Δ = 02-4·9·(-4)
Δ = 144
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{144}=12$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-12}{2*9}=\frac{-12}{18} =-2/3 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+12}{2*9}=\frac{12}{18} =2/3 $
| 42=5x–18 | | 6k+21=57 | | 0=5x^2+75x-130 | | 20x-18=(3x+4)*5+2 | | (20-2p)*(30-3p)=400 | | x/2+19=45 | | (x/2)-12=14 | | 10=(10+x) | | 5/1000x=250 | | 24z-72=288 | | 120+2x=8+12x | | 3(6+7y)+2(1-5)=42 | | 4d=37 | | 1/2(9x-6)=13 | | -9=(y-3) | | 24xZ-72=288 | | (5x+40)=5x=2x | | x=0.2(2x-1)=0.2x+0.08 | | 2(x-2=3x+18 | | 44x=60 | | -14r=182 | | 2y^2-5y-27=(y-1)^2 | | 90=3y+(12*3) | | n+6/5=4 | | 120-2x=8+12x | | -38=2x | | 0.4(6x+15)-0.4x=0.2(5x-20)+10x | | 6+c=-19 | | n=019+19 | | 3(x+2)=x2 | | b/17=10 | | 22x+4+26x+2=150 |