If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2a^2+10a-28=0
a = 2; b = 10; c = -28;
Δ = b2-4ac
Δ = 102-4·2·(-28)
Δ = 324
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{324}=18$$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-18}{2*2}=\frac{-28}{4} =-7 $$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+18}{2*2}=\frac{8}{4} =2 $
| (30-x)+(4x-6)+(2x-16)=180 | | 50-2x=110-42x | | 5v+6=3v+54 | | 120+3x+15=x | | -3=-t+4 | | 72-x=88-2x | | 7y-10(6y+22)=-8 | | 72-x+88-2x=180 | | 115(y+2)=3(4y+5) | | 8^2x-2=32^3x-2 | | 3(60+x)+15=x | | 8t+3t+14t-7=-17 | | 15-4x=10x | | 9*(x-7.5)^2=56.3 | | 3x/7+4=1 | | 29m=41 | | w*5w=320 | | X=160-3x+18 | | X^-8x=20 | | X+1/3x+1/8x=70 | | 8/4x+x=63 | | (2x+17)/(x+1)=x+5 | | w-9.62=3.19 | | 35=-x+1 | | u+1/3=31/4 | | m29=41 | | |4x+2|+8=15 | | 80=x+.2x | | 0.75x+30=0.8(1.25x) | | u-7/8=-1/2 | | -28=x | | a÷-18=5 |