If it's not what You are looking for type in the equation solver your own equation and let us solve it.
8x^2-13x+15=0
a = 8; b = -13; c = +15;
Δ = b2-4ac
Δ = -132-4·8·15
Δ = -311
Delta is less than zero, so there is no solution for the equation
| g(2)=2²-4(2) | | g(2)=2² | | 21y-20y=13 | | g(2)=(2)² | | 35-4x²=-14 | | 75/(x-2)=75/x+10 | | (p²+6)²=9 | | -2,5x-7=3x-22 | | ×/y=32/21. | | 2g=72 | | 3(2x+4)-3=8(3x-12)+4 | | (-1)(x)=9-6x | | 2(3x+3)=4(x-6) | | 20-4y÷3=12 | | 3x/6+4=2x-1 | | {m}^{2}+8m=-16 | | 4(x+7)=17 | | 8x+(-16)=-2x+4 | | (40*x)+(16*1.5x)=1,366.39 | | 1.15=x*0.15 | | Z2=-8+6i | | 0.7/x=100 | | F(x)=x2-3x-1 | | K(x)=2× | | 12-5(9-2x=3(x-2)-27 | | (6x-12)/3-x=3x-(x+1)+1 | | 3-4x=-4x+x+2 | | 2.718281828^(x+2)=2.71821828^x+9 | | 3x-5=-1/2x+5 | | 2(x+3)2^=18 | | 7x²+3x-4=0 | | -5x=19-4 |