If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x(3x+4)=15
We move all terms to the left:
x(3x+4)-(15)=0
We multiply parentheses
3x^2+4x-15=0
a = 3; b = 4; c = -15;
Δ = b2-4ac
Δ = 42-4·3·(-15)
Δ = 196
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{196}=14$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-14}{2*3}=\frac{-18}{6} =-3 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+14}{2*3}=\frac{10}{6} =1+2/3 $
| 1/x=18.82 | | 5-0.25x=x/3-7/3 | | -3.1+7-7.4=1.5-6x-9 | | 5(x-3)+4(2x-6)=0 | | 4x^2-54x+72=0 | | x+0.7*x=850 | | 3(x+2)=212 | | x2-108x-720=0 | | 1x+2x=60 | | x2+2=x2 | | 2x-(x+1.4x)=60 | | v+3-2(-6v-5)=3(v-1) | | 2x(x+3)-(x+3)(x+1)=0 | | 287+x=4x | | 4(x-3)-6x=-2)x+6) | | 4-3x-12=4x-5+x | | 2x-25=(75-100)+x+25 | | 2p(p+3)-3p(2p=1) | | 2n-7=5n-4 | | 4/7x=-5/3 | | 15-12x=-2x+13 | | 5(8f−5)−7=15968 | | 5(8f−5)−7=159685(8f−5)−7=1596 | | 42x+18=-24+ | | 15-12x=-21x+4 | | 3x2-5=43 | | 8x+17=5x-3 | | 8y-36=4(y-7) | | 4(x-5)-2(6x-7)=1 | | 8y-36=4y-28 | | 7(x-2)-6(3x-5)=5 | | 6+4(2y+5)=10+12 |