If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying -7x2 + 20x + -5 = 0 Reorder the terms: -5 + 20x + -7x2 = 0 Solving -5 + 20x + -7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -7 the coefficient of the squared term: Divide each side by '-7'. 0.7142857143 + -2.857142857x + x2 = 0 Move the constant term to the right: Add '-0.7142857143' to each side of the equation. 0.7142857143 + -2.857142857x + -0.7142857143 + x2 = 0 + -0.7142857143 Reorder the terms: 0.7142857143 + -0.7142857143 + -2.857142857x + x2 = 0 + -0.7142857143 Combine like terms: 0.7142857143 + -0.7142857143 = 0.0000000000 0.0000000000 + -2.857142857x + x2 = 0 + -0.7142857143 -2.857142857x + x2 = 0 + -0.7142857143 Combine like terms: 0 + -0.7142857143 = -0.7142857143 -2.857142857x + x2 = -0.7142857143 The x term is -2.857142857x. Take half its coefficient (-1.428571429). Square it (2.040816328) and add it to both sides. Add '2.040816328' to each side of the equation. -2.857142857x + 2.040816328 + x2 = -0.7142857143 + 2.040816328 Reorder the terms: 2.040816328 + -2.857142857x + x2 = -0.7142857143 + 2.040816328 Combine like terms: -0.7142857143 + 2.040816328 = 1.3265306137 2.040816328 + -2.857142857x + x2 = 1.3265306137 Factor a perfect square on the left side: (x + -1.428571429)(x + -1.428571429) = 1.3265306137 Calculate the square root of the right side: 1.151751108 Break this problem into two subproblems by setting (x + -1.428571429) equal to 1.151751108 and -1.151751108.Subproblem 1
x + -1.428571429 = 1.151751108 Simplifying x + -1.428571429 = 1.151751108 Reorder the terms: -1.428571429 + x = 1.151751108 Solving -1.428571429 + x = 1.151751108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + x = 1.151751108 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + x = 1.151751108 + 1.428571429 x = 1.151751108 + 1.428571429 Combine like terms: 1.151751108 + 1.428571429 = 2.580322537 x = 2.580322537 Simplifying x = 2.580322537Subproblem 2
x + -1.428571429 = -1.151751108 Simplifying x + -1.428571429 = -1.151751108 Reorder the terms: -1.428571429 + x = -1.151751108 Solving -1.428571429 + x = -1.151751108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + x = -1.151751108 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + x = -1.151751108 + 1.428571429 x = -1.151751108 + 1.428571429 Combine like terms: -1.151751108 + 1.428571429 = 0.276820321 x = 0.276820321 Simplifying x = 0.276820321Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.580322537, 0.276820321}
| (r-4)(r+18)=-41 | | Log(x-4)=0 | | 3x-1=-111-7x | | cz+d=e | | 5x^4+18x^2=0 | | (2/3)^2x=(27/8)^3 | | by-c=d | | 6x+9x-60=40-5x | | 16m^4=45 | | 9-5x=-3-6x+1 | | ln(3x-18)=2 | | 0.5x-3=-21 | | bz=m+n | | 100x+x+x=1000 | | tanX=15/12 | | 100x+x+x=100 | | 2x+25=4x-9 | | 8(5x)-2=144 | | (13d)0= | | x(30)=100(7) | | 6n-29=-54+n | | sinx=.9 | | 3(4a)= | | 2+2x-7+6= | | 30+x=65 | | 10x^2+5y^2-12xy-4x-6y-13=0 | | X^2+y^2-12xy-4x-6y-13=0 | | 5x-6=x+24 | | -2(-2x+7)-8x=2(x-5)-1 | | 2x(3-x)=26 | | 3x+7-9=6 | | f(3)=6x+1 |