If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying x2 + 18x + 81 = 42 Reorder the terms: 81 + 18x + x2 = 42 Solving 81 + 18x + x2 = 42 Solving for variable 'x'. Reorder the terms: 81 + -42 + 18x + x2 = 42 + -42 Combine like terms: 81 + -42 = 39 39 + 18x + x2 = 42 + -42 Combine like terms: 42 + -42 = 0 39 + 18x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-39' to each side of the equation. 39 + 18x + -39 + x2 = 0 + -39 Reorder the terms: 39 + -39 + 18x + x2 = 0 + -39 Combine like terms: 39 + -39 = 0 0 + 18x + x2 = 0 + -39 18x + x2 = 0 + -39 Combine like terms: 0 + -39 = -39 18x + x2 = -39 The x term is 18x. Take half its coefficient (9). Square it (81) and add it to both sides. Add '81' to each side of the equation. 18x + 81 + x2 = -39 + 81 Reorder the terms: 81 + 18x + x2 = -39 + 81 Combine like terms: -39 + 81 = 42 81 + 18x + x2 = 42 Factor a perfect square on the left side: (x + 9)(x + 9) = 42 Calculate the square root of the right side: 6.480740698 Break this problem into two subproblems by setting (x + 9) equal to 6.480740698 and -6.480740698.Subproblem 1
x + 9 = 6.480740698 Simplifying x + 9 = 6.480740698 Reorder the terms: 9 + x = 6.480740698 Solving 9 + x = 6.480740698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 6.480740698 + -9 Combine like terms: 9 + -9 = 0 0 + x = 6.480740698 + -9 x = 6.480740698 + -9 Combine like terms: 6.480740698 + -9 = -2.519259302 x = -2.519259302 Simplifying x = -2.519259302Subproblem 2
x + 9 = -6.480740698 Simplifying x + 9 = -6.480740698 Reorder the terms: 9 + x = -6.480740698 Solving 9 + x = -6.480740698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = -6.480740698 + -9 Combine like terms: 9 + -9 = 0 0 + x = -6.480740698 + -9 x = -6.480740698 + -9 Combine like terms: -6.480740698 + -9 = -15.480740698 x = -15.480740698 Simplifying x = -15.480740698Solution
The solution to the problem is based on the solutions from the subproblems. x = {-2.519259302, -15.480740698}
| r-11+8r=29 | | 6m+5=8m-3 | | 10x^3+45x^2+10x+45=0 | | r-11+6r=29 | | 9(x+7)=9x+63 | | -x+9=0 | | r-11+6r=11 | | x^2+10x+15=17 | | 4(3)2+2(3)-5= | | 3y-2=24 | | r-1+6r=11 | | 2a^2+4a+16=0 | | 6(x+5)=6x+30 | | X+-3y=5 | | 6r+6r-1=11 | | X^6-98X^3-3375=0 | | X^6-98X^3=3375 | | 5x+6=15+4x | | 55x+1/2=11(5x+25) | | 4(3)2(3)-5= | | 50x+1/2=5(10x+25) | | 8a^2-2a-1=0 | | x^2-4x+4=12 | | 327.816=2*3.14*r^2+2*3.14*r*14.4 | | 4(3)+2(3)-5= | | 2X^3+14X^2+20=0 | | y=x-36 | | 24x+1/2=8(3x+25) | | -8+2x=-3x+12 | | -2/3x+13=y | | 4x+1/2=5(6x+57) | | 7x+10+6x=-42 |