If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x(x+7)=9
We move all terms to the left:
4x(x+7)-(9)=0
We multiply parentheses
4x^2+28x-9=0
a = 4; b = 28; c = -9;
Δ = b2-4ac
Δ = 282-4·4·(-9)
Δ = 928
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{928}=\sqrt{16*58}=\sqrt{16}*\sqrt{58}=4\sqrt{58}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(28)-4\sqrt{58}}{2*4}=\frac{-28-4\sqrt{58}}{8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(28)+4\sqrt{58}}{2*4}=\frac{-28+4\sqrt{58}}{8} $
| 1/4+1/7=1/x | | y=35,000(1.12)^6.5 | | 5s-10=30 | | 3/5(x+2)=15 | | 5(1z-2)+3z-4=-38 | | 3(x+4)+3=-2x | | p+8/5=-3 | | -3x-2x5=0 | | 2(x-4)=12+2x | | 4=−1+-1+x/2 | | -16-12x=-64 | | -8-12v=-236 | | 7x+8x-9=3(5x+7) | | 5(x-4)=4x-5 | | 2g+8=3+5g | | 18=-4s+2 | | 8+a/10=7 | | 20/60=12/r= | | 3(x-4)-5=8 | | 6x+6+2x=180 | | 6+n/4=0 | | 4=45x | | 2f-5=33 | | -9+t=-8+t+t | | 44.50+p=112 | | -1/7x+4=6 | | -9=5+7h | | 25=-2x+15 | | 8x+4(4x+3)=4(4x+4)+20 | | x=15+7 | | 3x+47=28 | | -(2p+2)=-2-4p |