If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(3x-1)(7x+7)=0
We multiply parentheses ..
(+21x^2+21x-7x-7)=0
We get rid of parentheses
21x^2+21x-7x-7=0
We add all the numbers together, and all the variables
21x^2+14x-7=0
a = 21; b = 14; c = -7;
Δ = b2-4ac
Δ = 142-4·21·(-7)
Δ = 784
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{784}=28$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(14)-28}{2*21}=\frac{-42}{42} =-1 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(14)+28}{2*21}=\frac{14}{42} =1/3 $
| 9(1-x)=2(1+2x)+2 | | 20=6+x/2 | | 5^3u-5^3=5^4u-2^3 | | -6(7r+2)=-12+2r | | -24+8p=-6(p-2)-8 | | .3x-9.1=10 | | 4/5+n=1/2 | | 6-x-4=14+8-6x-5 | | 6+1-5n+7=8-4n | | -12=-3/4u | | 223x=8864 | | 223x=4 | | -110=-8(7a-5)+6a | | 183=-3(-5+5v)-6v | | 277x=8864 | | 2=5+n+2n | | 2=5+2n | | 252y=7056 | | 5-|x+3|=-5 | | 10x=3x+9 | | 5(3+x)=2(x+6) | | 3m+7=6(m+2) | | 3082=x+.05x | | F(2)=-x^2+4x+1 | | 0.5(2x-8)=2(3x-7) | | G(-5)=5x+4 | | F(-2)=2x^2-3x | | 6(x+1)^(2)+7x=-9 | | -8+x/2=-2 | | -6=p/2+4 | | 277b=8864 | | 9=b-16/9 |