If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0=x^2+28x-5
We move all terms to the left:
0-(x^2+28x-5)=0
We add all the numbers together, and all the variables
-(x^2+28x-5)=0
We get rid of parentheses
-x^2-28x+5=0
We add all the numbers together, and all the variables
-1x^2-28x+5=0
a = -1; b = -28; c = +5;
Δ = b2-4ac
Δ = -282-4·(-1)·5
Δ = 804
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{804}=\sqrt{4*201}=\sqrt{4}*\sqrt{201}=2\sqrt{201}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-28)-2\sqrt{201}}{2*-1}=\frac{28-2\sqrt{201}}{-2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-28)+2\sqrt{201}}{2*-1}=\frac{28+2\sqrt{201}}{-2} $
| 18p=300 | | 9.3+(v/8)=-3.5 | | 2x^+12x-45=0 | | 2xX20=165 | | -7=-3=2u | | 3b+6=6b-9 | | (1+x)^10-1-50x=0 | | 3(x+1=8 | | 525+2.5n=1875 | | c/0.8=30 | | 175+2.5n=1875 | | -3g+-5g-4g+-10=14 | | (14+x)•6=(12+x)•7 | | 99x^2-200x=-100 | | 2^(3x)=8 | | 12=72x+12 | | 99x^2-200x=100 | | -24+12d=2(d-3)+222 | | -3q+-6q+19q+-13q=18 | | 10x+20=-5.5 | | 7x+25=13x-15 | | (4x+6)+(7x-7)=(20x-11) | | 127=37+0.45n | | 5(x-2)-6=-15 | | h^2-3h+6=0 | | 7-3z=-9z+19 | | x+54=20x+54=20 | | -3q+-6q+13q=18 | | (20x-11)=(4x+6)=(7x-7) | | 0.5^x=0.99 | | 6x-5=-4x-15 | | 3(m-4)=8 |