If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(7x+5)(x-3)=0
We multiply parentheses ..
(+7x^2-21x+5x-15)=0
We get rid of parentheses
7x^2-21x+5x-15=0
We add all the numbers together, and all the variables
7x^2-16x-15=0
a = 7; b = -16; c = -15;
Δ = b2-4ac
Δ = -162-4·7·(-15)
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$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-16)-26}{2*7}=\frac{-10}{14} =-5/7 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-16)+26}{2*7}=\frac{42}{14} =3 $
| 4-4(3-6x)=-176 | | 1/2(12n-2=5n-7) | | 9=x5 | | -6x-30=-4x-20 | | 3x-8=4(×+5) | | (p+10)(p-10)=0 | | 19.2=y/8 | | 4+6(x-9)=9x+11 | | 3x-2x+4=12 | | (7x+5)=(8x+9) | | 4(2n+1=52 | | 2x=7,000,000 | | -15z^2-34z+15=0 | | 4/x=x=+3 | | 5/4u=45 | | 12×=4x+8+20 | | 48+(x-11)=180 | | 12=3/4-x | | 9x^2-2x-2025=0 | | 1/2+w=3(1/4) | | 8x^2+8=-33 | | 1/4(2x+8)=16 | | 90=3x+57 | | -17=-7+x/5 | | 180=x-5+22 | | 90=8x+66 | | 3(2x-8)=3(2x−8)=66 | | 180=3x+117 | | 180=2x+86 | | 2u+8=14 | | 90=4x+42 | | 1/3x=12x |