If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.7x^2=2.1x
We move all terms to the left:
0.7x^2-(2.1x)=0
We add all the numbers together, and all the variables
0.7x^2-(+2.1x)=0
We get rid of parentheses
0.7x^2-2.1x=0
a = 0.7; b = -2.1; c = 0;
Δ = b2-4ac
Δ = -2.12-4·0.7·0
Δ = 4.41
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{-(-2.1)-\sqrt{4.41}}{2*0.7}=\frac{2.1-\sqrt{4.41}}{1.4} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2.1)+\sqrt{4.41}}{2*0.7}=\frac{2.1+\sqrt{4.41}}{1.4} $
| 2(4x−5)=3x−1. | | 3u+15=6u-12 | | 4(x^2+100x-2400)=0 | | -6b-10=56 | | x=5(2)+6 | | (x^2)+((x+1)^2)=61 | | 2(2x+5)+2(x-7)=68 | | 50+2x=–190. | | X-7/9x+1=1/4 | | 108=-4(3-8x) | | 0.5-1.75x=0.25x+4.5 | | 0=6x-10000/(3x^2) | | 6(8v+6)=2(18+8v) | | 11y+6=90 | | 4+3x=1.5+2x | | y+1.2=3.7 | | 10c+10=40 | | 236+z=500 | | x-2+2x-3+3x-42+x+1=360 | | 3+1.75x=2x+2 | | 6.5=w-1.4 | | 75x4=300 | | x+4.5−2x=2.3+7x+2. | | x+4.5−2x=2.3+7x+2.2 | | 125x=5000 | | 5e-4=-9 | | 23j=943 | | 40/20=x/140 | | (10x+2)°=(12x-4) | | -3(9+c)=33 | | 5/1=45/g | | 11k-15=73 |