If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5(3x-7)(5x+4)=0
We multiply parentheses ..
5(+15x^2+12x-35x-28)=0
We multiply parentheses
75x^2+60x-175x-140=0
We add all the numbers together, and all the variables
75x^2-115x-140=0
a = 75; b = -115; c = -140;
Δ = b2-4ac
Δ = -1152-4·75·(-140)
Δ = 55225
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{55225}=235$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-115)-235}{2*75}=\frac{-120}{150} =-4/5 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-115)+235}{2*75}=\frac{350}{150} =2+1/3 $
| 121=11g | | 53+8n=13+2n | | 62+7x+28=17x | | 9m=5-7m | | 45+3m=12+6m | | (8+a)+a=20 | | 1.9y=6 | | 3z+(z-5)=-48 | | 240+30x=0 | | y=70+0.6y | | 5x+-8=-4x+1 | | 8m+-1=7 | | 10x-20+9x-6=145 | | 5-9t=49 | | 3/4x99=27 | | 16=w=72 | | 12x=15x+33 | | 3(−x+2)+x−1=−x−3 | | 2(6x)=15x+33 | | x+28+19x-2=66 | | 6x+2+3x-1=181-9x | | 10x-38+9x-13=120 | | 4x+4-35=85 | | 6+4m=58 | | 11-3(a-2)=20 | | 4x/2-3x55-7+10-(-8)=180. | | 5x-9+6x-16=74 | | S(t)=-16t^2+200t+4 | | 10x+40=6x+8 | | 5/6x+21=1/3(2x-9) | | 2x+x+48.5=119 | | 100-5x=140-5(x-5) |