If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(0.4-x)(1.2-x)=0
We add all the numbers together, and all the variables
(-1x+0.4)(-1x+1.2)=0
We multiply parentheses ..
(+x^2-1.2x-0.4x+0.48)=0
We get rid of parentheses
x^2-1.2x-0.4x+0.48=0
We add all the numbers together, and all the variables
x^2-1.6x+0.48=0
a = 1; b = -1.6; c = +0.48;
Δ = b2-4ac
Δ = -1.62-4·1·0.48
Δ = 0.64
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1.6)-\sqrt{0.64}}{2*1}=\frac{1.6-\sqrt{0.64}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1.6)+\sqrt{0.64}}{2*1}=\frac{1.6+\sqrt{0.64}}{2} $
| 2y+2y-20=180 | | 1=0.5(9x+2) | | k^2-9^k-36=0 | | 1/2(9x+2)=1 | | 1=(1/2)(9x+2) | | 1=1/2(9x+2) | | x+x+2+5=27 | | x²-7x=8 | | 9/7=45/x | | (0.6-2x)*(0.6-2x)=0 | | x+x+29=53 | | a/3+6=18 | | 7+8a+15=-13 | | 5-2(x+3)=-5 | | -2(2n=1=-14 | | 9-2y=4+3(y-1) | | (9x−5)−(6x−8)=33 | | -12s-49=12 | | Z^4+3-4i=0 | | -2(m-1=-8 | | 12/14=4y | | 4/5x-1=-17 | | 3(x+2)-2x=-18 | | x^2+x-640=0 | | 3x+15+1x+25=30+3x+15 | | 4/5n=-80 | | 3x^2+5x-1920=0 | | 0.04x+0.06(20)=0.76 | | 15x+90+8x-2=180 | | 4(x+1)+5=2x+20 | | (5x+67)+(64-x)+(7x-6)+70=360 | | 7x+4+6x=13+4x |