If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying -81x2 + -21x + 7 = 0 Reorder the terms: 7 + -21x + -81x2 = 0 Solving 7 + -21x + -81x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -81 the coefficient of the squared term: Divide each side by '-81'. -0.08641975309 + 0.2592592593x + x2 = 0 Move the constant term to the right: Add '0.08641975309' to each side of the equation. -0.08641975309 + 0.2592592593x + 0.08641975309 + x2 = 0 + 0.08641975309 Reorder the terms: -0.08641975309 + 0.08641975309 + 0.2592592593x + x2 = 0 + 0.08641975309 Combine like terms: -0.08641975309 + 0.08641975309 = 0.00000000000 0.00000000000 + 0.2592592593x + x2 = 0 + 0.08641975309 0.2592592593x + x2 = 0 + 0.08641975309 Combine like terms: 0 + 0.08641975309 = 0.08641975309 0.2592592593x + x2 = 0.08641975309 The x term is 0.2592592593x. Take half its coefficient (0.1296296297). Square it (0.01680384090) and add it to both sides. Add '0.01680384090' to each side of the equation. 0.2592592593x + 0.01680384090 + x2 = 0.08641975309 + 0.01680384090 Reorder the terms: 0.01680384090 + 0.2592592593x + x2 = 0.08641975309 + 0.01680384090 Combine like terms: 0.08641975309 + 0.01680384090 = 0.10322359399 0.01680384090 + 0.2592592593x + x2 = 0.10322359399 Factor a perfect square on the left side: (x + 0.1296296297)(x + 0.1296296297) = 0.10322359399 Calculate the square root of the right side: 0.321284288 Break this problem into two subproblems by setting (x + 0.1296296297) equal to 0.321284288 and -0.321284288.Subproblem 1
x + 0.1296296297 = 0.321284288 Simplifying x + 0.1296296297 = 0.321284288 Reorder the terms: 0.1296296297 + x = 0.321284288 Solving 0.1296296297 + x = 0.321284288 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1296296297' to each side of the equation. 0.1296296297 + -0.1296296297 + x = 0.321284288 + -0.1296296297 Combine like terms: 0.1296296297 + -0.1296296297 = 0.0000000000 0.0000000000 + x = 0.321284288 + -0.1296296297 x = 0.321284288 + -0.1296296297 Combine like terms: 0.321284288 + -0.1296296297 = 0.1916546583 x = 0.1916546583 Simplifying x = 0.1916546583Subproblem 2
x + 0.1296296297 = -0.321284288 Simplifying x + 0.1296296297 = -0.321284288 Reorder the terms: 0.1296296297 + x = -0.321284288 Solving 0.1296296297 + x = -0.321284288 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1296296297' to each side of the equation. 0.1296296297 + -0.1296296297 + x = -0.321284288 + -0.1296296297 Combine like terms: 0.1296296297 + -0.1296296297 = 0.0000000000 0.0000000000 + x = -0.321284288 + -0.1296296297 x = -0.321284288 + -0.1296296297 Combine like terms: -0.321284288 + -0.1296296297 = -0.4509139177 x = -0.4509139177 Simplifying x = -0.4509139177Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.1916546583, -0.4509139177}
| 2(x+2)+3x=2(x+1)1 | | 2(a-8)+3=3(a+2)-3a-1a | | x/50=.25 | | -6/7-1/2x=-4/3 | | 20/80=.25 | | 9y-3=11y+15 | | 20/80=k | | 20/80= | | 0.50x+0.25(30)=38.5 | | 2+3x=6+2x | | 20/80 | | 5z-1=16 | | x^2-79x-162=0 | | 2x^2+4x+6= | | (36/144)^(1/2) | | 1200x-100=3230x-190 | | 4xsquared-8=0 | | log[3](7x-9)=log[3](2x^2) | | 11x-(7x-2)=38 | | (36/144)^1/2 | | log[3](7x-9)=log[3](4) | | (36/133)^1/2 | | 3x-5=24x-7 | | 15ab/4b^4÷5a/2b | | 3(x-6)=3x-16 | | 1200x+100=3230x-190 | | 1200x+100=3230x+190 | | 8+4v=8(1-7v)-4v | | 5y-3=3y+18 | | 11m-10=-20+12m | | 50/x=4 | | 275=15+10x |