If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-5t^2+15t+90=0
a = -5; b = 15; c = +90;
Δ = b2-4ac
Δ = 152-4·(-5)·90
Δ = 2025
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{2025}=45$$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(15)-45}{2*-5}=\frac{-60}{-10} =+6 $$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(15)+45}{2*-5}=\frac{30}{-10} =-3 $
| 3w(w-1)(w+5)=0 | | 5n+25+2n+29=180 | | -5=3+8x-11=12 | | 5x-2x-6=4x | | X+b=7 | | -2x=8-3x | | 13n-19=17 | | 2x+42=10+3x | | (3z-7)(1+z)=0 | | -21+p=44 | | 2t/7=-10 | | 0=0.36x-0.003x^2 | | 3x-7=4×-9 | | 2.5x+15=-21 | | (y+7)(y+1)=0 | | 6(x-3)=2+2x | | 2a-7=-20 | | 2b+4-2=12 | | 3(x+1)+2(x)=23 | | 6x+19=9x+14 | | -5=9x-36-8x | | 5x-3+8x-11=12 | | 15+15(x-4)=500 | | -11=66-7a | | 4(2x-3)-(7x+4)=2 | | -14.5(-1.5x)=-31 | | 5x+2(x-30)=3 | | -4-8x=-16-6x | | 8-1/2x=10 | | -2h-5(h+10)=34 | | 23(6−9x)=16 | | 1/2n-19=14 |