If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2+15x+200=0
a = 1; b = 15; c = +200;
Δ = b2-4ac
Δ = 152-4·1·200
Δ = -575
Delta is less than zero, so there is no solution for the equation
| X=(190-2x)/3 | | -5j=-15-4j | | a2+12a+11=a+ | | −8y−6=−46 | | 2=2= 1/8(6x−24) | | −n=43 | | 3x.5x−4=4x+1 | | (3x-2)²-16=0 | | -2x+2(3x+8)=40 | | 30x+15=23x-34 | | –2h−1=5h−1 | | -7+d=-7-7d | | -x+2-6x=16 | | 2x2=21 | | X²-29x=0 | | A=25πh | | 2x-7(x-6)=-3(4-x) | | -10+11x=12 | | 5n-8=-31 | | 10=12+y | | 16x-40=4x | | 2x-6(x-6)=-3(4-x) | | 16x-40=-4x | | -19+x=-48 | | 3x+5=2×-+2 | | –4(2+x)=8 | | 3(x-5)=6x+12 | | 1/3x=2/x+1 | | 5–4x+3=–30 | | 10/15=4/x−5 | | 2y–20=-50 | | 2/3x+8=40/3 |