If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying -1x2 + 20x + -81 = 0 Reorder the terms: -81 + 20x + -1x2 = 0 Solving -81 + 20x + -1x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 81 + -20x + x2 = 0 Move the constant term to the right: Add '-81' to each side of the equation. 81 + -20x + -81 + x2 = 0 + -81 Reorder the terms: 81 + -81 + -20x + x2 = 0 + -81 Combine like terms: 81 + -81 = 0 0 + -20x + x2 = 0 + -81 -20x + x2 = 0 + -81 Combine like terms: 0 + -81 = -81 -20x + x2 = -81 The x term is -20x. Take half its coefficient (-10). Square it (100) and add it to both sides. Add '100' to each side of the equation. -20x + 100 + x2 = -81 + 100 Reorder the terms: 100 + -20x + x2 = -81 + 100 Combine like terms: -81 + 100 = 19 100 + -20x + x2 = 19 Factor a perfect square on the left side: (x + -10)(x + -10) = 19 Calculate the square root of the right side: 4.358898944 Break this problem into two subproblems by setting (x + -10) equal to 4.358898944 and -4.358898944.Subproblem 1
x + -10 = 4.358898944 Simplifying x + -10 = 4.358898944 Reorder the terms: -10 + x = 4.358898944 Solving -10 + x = 4.358898944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 4.358898944 + 10 Combine like terms: -10 + 10 = 0 0 + x = 4.358898944 + 10 x = 4.358898944 + 10 Combine like terms: 4.358898944 + 10 = 14.358898944 x = 14.358898944 Simplifying x = 14.358898944Subproblem 2
x + -10 = -4.358898944 Simplifying x + -10 = -4.358898944 Reorder the terms: -10 + x = -4.358898944 Solving -10 + x = -4.358898944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -4.358898944 + 10 Combine like terms: -10 + 10 = 0 0 + x = -4.358898944 + 10 x = -4.358898944 + 10 Combine like terms: -4.358898944 + 10 = 5.641101056 x = 5.641101056 Simplifying x = 5.641101056Solution
The solution to the problem is based on the solutions from the subproblems. x = {14.358898944, 5.641101056}
| x-3/4=7/19 | | 4y-14=42 | | 2x^2+6x-4-(x+1)(x+1)=0 | | x^2+20x-81=0 | | 10.80/(10.5*150/360) | | (7x-4)+(-7x+4)= | | 2x^2-8x-1-(x-2)(x-2)=0 | | 2x-1/3=1/3(2x-1) | | -6(9x+5)-3x+4x=-408+4 | | x+21+20x+34=180 | | 3x/8=x-5 | | 3.649+12.3v=149.329 | | x^2-3/3=11 | | 2v^2+v+22-(v+4)(v+4)=0 | | -2(1x+1)=-6 | | 26x+1+25x+5=180 | | 4x-6+7(x+1)=-3-4 | | 2[8x-1]+7[x+5]=-59 | | -20-(4*-1)=-15 | | 2v-v=v-8 | | 2(x-3)=x-(-2) | | ln*(2*x)=4.8 | | 9+4x=4x+5 | | x-20+x-20+x-20=180 | | 47+9x=-79 | | 4x-6+(x+1)=-3-4 | | 5(8+3x)=175 | | a+6-4a=9-6a | | -48=6(x+1) | | ln*(3x-14)-ln*x=ln*4 | | -8-6v-8=-6v-16 | | 2a*(-3b)= |