If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying 20x2 + -63x + -21 = 0 Reorder the terms: -21 + -63x + 20x2 = 0 Solving -21 + -63x + 20x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 20 the coefficient of the squared term: Divide each side by '20'. -1.05 + -3.15x + x2 = 0 Move the constant term to the right: Add '1.05' to each side of the equation. -1.05 + -3.15x + 1.05 + x2 = 0 + 1.05 Reorder the terms: -1.05 + 1.05 + -3.15x + x2 = 0 + 1.05 Combine like terms: -1.05 + 1.05 = 0.00 0.00 + -3.15x + x2 = 0 + 1.05 -3.15x + x2 = 0 + 1.05 Combine like terms: 0 + 1.05 = 1.05 -3.15x + x2 = 1.05 The x term is -3.15x. Take half its coefficient (-1.575). Square it (2.480625) and add it to both sides. Add '2.480625' to each side of the equation. -3.15x + 2.480625 + x2 = 1.05 + 2.480625 Reorder the terms: 2.480625 + -3.15x + x2 = 1.05 + 2.480625 Combine like terms: 1.05 + 2.480625 = 3.530625 2.480625 + -3.15x + x2 = 3.530625 Factor a perfect square on the left side: (x + -1.575)(x + -1.575) = 3.530625 Calculate the square root of the right side: 1.878995742 Break this problem into two subproblems by setting (x + -1.575) equal to 1.878995742 and -1.878995742.Subproblem 1
x + -1.575 = 1.878995742 Simplifying x + -1.575 = 1.878995742 Reorder the terms: -1.575 + x = 1.878995742 Solving -1.575 + x = 1.878995742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.575' to each side of the equation. -1.575 + 1.575 + x = 1.878995742 + 1.575 Combine like terms: -1.575 + 1.575 = 0.000 0.000 + x = 1.878995742 + 1.575 x = 1.878995742 + 1.575 Combine like terms: 1.878995742 + 1.575 = 3.453995742 x = 3.453995742 Simplifying x = 3.453995742Subproblem 2
x + -1.575 = -1.878995742 Simplifying x + -1.575 = -1.878995742 Reorder the terms: -1.575 + x = -1.878995742 Solving -1.575 + x = -1.878995742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.575' to each side of the equation. -1.575 + 1.575 + x = -1.878995742 + 1.575 Combine like terms: -1.575 + 1.575 = 0.000 0.000 + x = -1.878995742 + 1.575 x = -1.878995742 + 1.575 Combine like terms: -1.878995742 + 1.575 = -0.303995742 x = -0.303995742 Simplifying x = -0.303995742Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.453995742, -0.303995742}
| 78-(Q+78-4Q)=78-4Q | | 5.3x+5-2.3x=2 | | 343x^3-64= | | 2x^4-9x^3+14x^2+21x-18=0 | | 5x^2+20x=25 | | 25x^2+11x=-10 | | 0.8(x+80)+x=145 | | 25x+5y=50 | | f(x)=2x^2+8x+3 | | 41.96=77.32-c | | 5x+3x-2x+x=1 | | -8x=4x-84 | | x-1.8x=-2 | | -2.08x^2+77.86x+1376058=0 | | -7(-1x-3)=21 | | 3x-3x+9x=8+1 | | 0.06(y-7)+0.08y=0.16y-0.6 | | 6x-12+4x-1=-7x+12-3x+5 | | -2.02x^2+77.89x+1279647=0 | | -7(2x+9)=-91 | | 11-2w=6w+1 | | p^2+2pq-120q^2= | | 5x+16=4x | | 6(2x+2)=60 | | 6-1.032(3-x)=18 | | -2.08x^2+77.86x-1376058=0 | | 9x=-3x+108 | | 7(10+6x)=-182 | | 2x+8=9x+19 | | q^2+6q-27= | | 3(8-3x)=-39 | | -8x=2x-10 |