If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(3x+7)(-5x+3)=0
We multiply parentheses ..
(-15x^2+9x-35x+21)=0
We get rid of parentheses
-15x^2+9x-35x+21=0
We add all the numbers together, and all the variables
-15x^2-26x+21=0
a = -15; b = -26; c = +21;
Δ = b2-4ac
Δ = -262-4·(-15)·21
Δ = 1936
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{1936}=44$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-26)-44}{2*-15}=\frac{-18}{-30} =3/5 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-26)+44}{2*-15}=\frac{70}{-30} =-2+1/3 $
| -10+8c=8c | | 10+14d=14+18d | | -2y−3=-3−2y | | 2-2y+4y=-8 | | -5r+7=-5r | | 1/2x+8=x+10 | | -14.6b-13.44=-13.4b | | 4(2-x)3.5=2(x-3)-8.3 | | -1−5s=7−5s | | 5x/11+4/11=1/11 | | 13m-11m-m+2=10 | | -3z+3z=0 | | -4w-14=18-2w | | -5.3m+13.41-m=-6.9m+4.47 | | 4(x+5)=8+6(2x-2 | | 3(-2+2y)=2 | | 18+8j=7j | | 5r-2r+5r=16 | | -8r(2r-5)=6+r | | -9(w+3)=-2w-6 | | 8b+4b-2b-6b=12 | | -13r-18=-15r | | 1/4x+1/3x=2x-17 | | 17.3c=17.2c-1.62 | | -981/2-1001/4=y | | 3^(x-8)+2=38 | | -4=5(-9x) | | 5.57-5.9p=-10.55-7.2p | | 3x+30=-3(x-8) | | 4x^2=10^6 | | 3^(x-8+2)=38 | | 9b-8b-1=6 |