If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7x(2x-4)=30
We move all terms to the left:
7x(2x-4)-(30)=0
We multiply parentheses
14x^2-28x-30=0
a = 14; b = -28; c = -30;
Δ = b2-4ac
Δ = -282-4·14·(-30)
Δ = 2464
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{2464}=\sqrt{16*154}=\sqrt{16}*\sqrt{154}=4\sqrt{154}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-28)-4\sqrt{154}}{2*14}=\frac{28-4\sqrt{154}}{28} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-28)+4\sqrt{154}}{2*14}=\frac{28+4\sqrt{154}}{28} $
| 8x+(6x-9)=180 | | 72=2(1-5x) | | 9-x÷4+2=10 | | 2.5=(0.5x-3) | | 2^2-11z+24=0 | | 8n-(5n-8)=10 | | 11x-6=109 | | 24k=189 | | 15=2-x | | 3y-(-2y)=10 | | 2(x-3)=x-6+x | | y-5=7y-21 | | x+x+(6x-9)=180 | | 5a+4a+10a+3a+8a=360 | | 3-2(x+1)=2x-11 | | y×y=169 | | -1x4+3=2x-4x2+3 | | 6+8b=54 | | .5=110/x | | 24k-9=180 | | 2(27)=9(x) | | 4x+5=2x=11 | | -5/6x-7/10x+1/5x=-52 | | 3(2x-8)=x+36 | | 5=3s+15.5-3s | | 6.1g+7=1.1g+32. | | (2)(27)=(9)(x) | | 1,500-16x=3,200 | | 2x+(6x-9)=180 | | -5x=6= | | y/3=23 | | 57(2x-7)=51(x+4) |