If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(X+4)(X-1)=0
We multiply parentheses ..
(+X^2-1X+4X-4)=0
We get rid of parentheses
X^2-1X+4X-4=0
We add all the numbers together, and all the variables
X^2+3X-4=0
a = 1; b = 3; c = -4;
Δ = b2-4ac
Δ = 32-4·1·(-4)
Δ = 25
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}$$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{25}=5$$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-5}{2*1}=\frac{-8}{2} =-4 $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+5}{2*1}=\frac{2}{2} =1 $
| 2/3(9x+9)-15=-1/5(40x-15) | | 8x0.5+x=500 | | 30+2x=20+2x | | -7a-5a=-33 | | (48)x(x)=580 | | 8y-6=14y+12 | | 48xx=580 | | 6(2-4×)+10x=-8x+21-6x | | 19x-(6x-3)=55 | | 28-7x=-56 | | 1x+4=50 | | -4(+4)+3=6(x+5)+6+6 | | x-2/x-5=2x+1/x-1 | | 10a+6-7a=30 | | 8y-3+y=2; | | 3m-5-12=7m-88-5 | | 10x+20+x=180 | | (10x+20)+(3x+4)=180 | | -4x=15+13 | | 3x+5=233 | | -1x+0=-9 | | x-5/18=7/9 | | 3y+5/3-2y=5/3 | | 2(5-3x)=86-2x | | 32-5x=6(x+3) | | 26=2x-6+4x | | 12x2-16=0 | | (9y+2)+(4y+6)+112=180 | | 12x-8=45 | | (2x+20)+x=90 | | 29-x/4=11 | | 180=(8x-1)+(3x+9)+(3x+4) |