If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2x^2-20x+90=0
a = 2; b = -20; c = +90;
Δ = b2-4ac
Δ = -202-4·2·90
Δ = -320
Delta is less than zero, so there is no solution for the equation
| 9x+25=755 | | J+3/8.j=3/4 | | s3=27 | | x/6=275+75 | | 4y2-10y=0 | | -2x2+32=0 | | m-293=103 | | y-26=105 | | 730-x=44 | | 633+x=1000 | | x^2+11x-480=0 | | -66x-16=0 | | x+x+(x/4)=54 | | y2+14y+24=0 | | 67-y=17 | | 8x-15=25/ | | 60-x=24 | | (2^2x)-(18)*(2^x)=40 | | (4^x+1)+(7^2x)=350 | | 9x^2-x-324=0 | | -6x-7x=7x+78 | | 6(-4x+9)=222 | | -6x+5+4x=11 | | 15x-4(3x+5)=7(2x+5) | | 6x+7=5(4x-1)-16 | | 129.5=(37x14)N | | 3.24x=35 | | 21+k=34 | | x/1=29 | | (x+1)(x-5)=(4x)(-x+3) | | x+2x+3x+4x+5x+6x+7x+8x+9x+10x=53+2x | | 95-7x=2(60-6x) |