If it's not what You are looking for type in the equation solver your own equation and let us solve it.

-4.9x^2+x-2=0

a = -4.9; b = 1; c = -2;

Δ = b^{2}-4ac

Δ = 1^{2}-4·(-4.9)·(-2)

Δ = -38.2

Delta is less than zero, so there is no solution for the equation

| 9(13-x)-4x=5x(21-2x)+9x | | -5(X-3)=-7x+35 | | 2(x+3)=(x-3 | | 100=2x+7x | | 4?22x?7=?6 | | –15b+21+5b=–19 | | 3a^2+17a-90=0 | | 7p/7=-84/7 | | ?5x+6=15 | | 2(3^(y+1))=162 | | 13?(2c+2)=2(c+2)+3c | | 25-20/m=5 | | 3d2+d?5=0 | | (3x-5)°=(x+15)° | | -9=3b–12 | | 21=7/4y | | 3.5=y-6.2 | | 0.5x28=14 | | {h}{9}-3=2 | | 2c-3=2(6-c)=7c | | 28/t-15=-11 | | 6x+2-2x=18 | | (5x)+(8x)=180 | | -3=15/x | | 3x-5=6-6x | | 6x+9x=5x+150 | | 12/8=36/n | | 3(2x+5)=2x+39 | | .5(4x+8)=-40 | | -7x-6=14-2x | | Y+16x-22=4x2 | | 8p-4p=+6 | | 3x+24=-x | | x+7+68=180 | | 6(1+n)=4(8n+9)-11n | | 5/3t=4(12)-40 | | -4x=-x+3x=-1 | | 2x+1=109 | | 1/2(7x-2)=44 | | 2(x+1)+3=6 | | 12(2/3)+2=m | | -9?8b=-4b+7 | | 2/9f=18 | | 6x=30=5 | | 1*d=2 | | x+4=5x4/2 | | 4/3/10=21/x | | (8-x)÷3=5-x | | 6/7r=6 | | x+4=5•4/2 | | 5(m+4)=(2m+20) | | -3(x-1)+3=9-2(x=1) | | 8x+24=30 | | 5(-3x-8)=50 | | 12y=7y+25 | | 7x+1=18.11 | | 3/e?=7 | | 6k+6=6 | | 7x+1=11.18 | | x+x-20=340+5+5 | | (5)x-8=20 | | 3(k+2)=-3(k-2) | | 3(v?8)?-7=7 | | (2/3)g+(1/2)=5/6 | | 3.6=w1.2 |

- Equations solver - equations involving one unknown
- Quadratic equations solver
- Percentage Calculator - Step by step
- Derivative calculator - step by step
- Graphs of functions
- Factorization
- Greatest Common Factor
- Least Common Multiple
- System of equations - step by step solver
- Fractions calculator - step by step
- Theory in mathematics
- Roman numerals conversion
- Tip calculator
- Numbers as decimals, fractions, percentages
- More or less than - questions