If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(3x-1)(5x+7)=0
We multiply parentheses ..
(+15x^2+21x-5x-7)=0
We get rid of parentheses
15x^2+21x-5x-7=0
We add all the numbers together, and all the variables
15x^2+16x-7=0
a = 15; b = 16; c = -7;
Δ = b2-4ac
Δ = 162-4·15·(-7)
Δ = 676
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{676}=26$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(16)-26}{2*15}=\frac{-42}{30} =-1+2/5 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(16)+26}{2*15}=\frac{10}{30} =1/3 $
| x/3+1/3=5 | | 0.6r=-24 | | 3/5x+5=20 | | x^2-74x+280=0 | | 6y+6=14 | | -4p+7=31 | | 4y-4=-13 | | T-t=11 | | 11-2(x+4)=22(x+5)-80 | | -11x+2(3x-5)=-14-4x | | 3x(x-5)=5(15-3x) | | 6x+7x=120 | | 3(y+2)-6(y-7)=30 | | 5+2)3(4n-9)=15 | | 600-25w=200= | | -7n+11=-6n-6 | | 4-(6-y)=5 | | 1/5(10-15x)+8=5 | | 8(x+2)+6=-42 | | w2+2w-3=0 | | x/19.7=0.609137055830 | | 9x-7+9x=14 | | -6a+2+7a=14-23 | | 7x-5x+4=14 | | 10+x+2x+x=90 | | -5/3c+4=-1/6 | | 5(4+x)=9(x-1) | | 28=5/3y-7 | | 12x+36+24=4 | | 5x^2+7=-3 | | 5^(x+4)=8 | | 7w-15w=56 |