If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying -3x2 + -13x + -21 = 0 Reorder the terms: -21 + -13x + -3x2 = 0 Solving -21 + -13x + -3x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-1'. -1(21 + 13x + 3x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(21 + 13x + 3x2)' equal to zero and attempt to solve: Simplifying 21 + 13x + 3x2 = 0 Solving 21 + 13x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 7 + 4.333333333x + x2 = 0 Move the constant term to the right: Add '-7' to each side of the equation. 7 + 4.333333333x + -7 + x2 = 0 + -7 Reorder the terms: 7 + -7 + 4.333333333x + x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 4.333333333x + x2 = 0 + -7 4.333333333x + x2 = 0 + -7 Combine like terms: 0 + -7 = -7 4.333333333x + x2 = -7 The x term is 4.333333333x. Take half its coefficient (2.166666667). Square it (4.694444446) and add it to both sides. Add '4.694444446' to each side of the equation. 4.333333333x + 4.694444446 + x2 = -7 + 4.694444446 Reorder the terms: 4.694444446 + 4.333333333x + x2 = -7 + 4.694444446 Combine like terms: -7 + 4.694444446 = -2.305555554 4.694444446 + 4.333333333x + x2 = -2.305555554 Factor a perfect square on the left side: (x + 2.166666667)(x + 2.166666667) = -2.305555554 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
| 2x-5=11x | | 4x+17=5x-29 | | 5x-7=-6x-7 | | .5(8c+12)=12c | | 16/4=w | | 3x-5=5y+4 | | -400m-(-4000)=0 | | 4x+20=5x+18 | | 6/35=s | | y=3.5-2.25 | | 4/3*25.12 | | 2708.8152=6.28*r^2+6.28*r*38.3 | | 5-h/11=-2 | | -0.5x+0.5=-x+4 | | 5(x+12)-3=97 | | 1+w=8-3w | | 4/3*3.14*2^3 | | 5-h/11-2 | | 1-6x+3=-6 | | 2x+7/3=5 | | 4x-4=-7x-59 | | 2(x-3)+4x-3=3(5x+9) | | x-13+x+3+x=57 | | 8/11= | | 6x+4x+2x=150 | | 4x=10x-18 | | 5x+6y+7x-3x+2y= | | 9-4(2p-1)=-45 | | m-3=4m-2 | | Tan^2-5tanx-3=0 | | 3/4w12 | | (x-13)+(x+3)+x=57 |