If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5x^2+7x-15=15
We move all terms to the left:
5x^2+7x-15-(15)=0
We add all the numbers together, and all the variables
5x^2+7x-30=0
a = 5; b = 7; c = -30;
Δ = b2-4ac
Δ = 72-4·5·(-30)
Δ = 649
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-\sqrt{649}}{2*5}=\frac{-7-\sqrt{649}}{10} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+\sqrt{649}}{2*5}=\frac{-7+\sqrt{649}}{10} $
| 6(10/3x+4/3)=78 | | 25c−0.05(25c)= | | y+26=1.7 | | 2x+-6+x+1=180 | | 3/x+1=1/2X= | | (2x^2-6x)^2-5(x^2+6x)=6 | | 1+7x=-13+4x-4 | | 3(2r-7)=-3 | | 2x+6(x-5)=-26 | | 0.5x=1.65 | | x=70−−√3 | | -7x-3=1-3x | | x3=9. | | 3f+15=90 | | 15=3(7x-5)+9x | | -12m+9=117 | | x+26+x=14+4x-10=180 | | 7(x+3)+2=11x+11 | | 2/7(x-5)=-2+2/5x | | -16x^2+18x+96=0 | | 4x-3=8x+6-12 | | −21 x−7=−11 | | 6x-28=56+48x | | -43=j+43 | | 4x+9/13=-3 | | 2x+3=5+8 | | 10+n/3=13 | | 12x−24+3x=12x+72+2 | | 13=2c+3+3c | | /3-8x=35 | | X-9=-3(x-5) | | 7x+12=2x+27 |