If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying 7x2 + 39x + -90 = 0 Reorder the terms: -90 + 39x + 7x2 = 0 Solving -90 + 39x + 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'. -12.85714286 + 5.571428571x + x2 = 0 Move the constant term to the right: Add '12.85714286' to each side of the equation. -12.85714286 + 5.571428571x + 12.85714286 + x2 = 0 + 12.85714286 Reorder the terms: -12.85714286 + 12.85714286 + 5.571428571x + x2 = 0 + 12.85714286 Combine like terms: -12.85714286 + 12.85714286 = 0.00000000 0.00000000 + 5.571428571x + x2 = 0 + 12.85714286 5.571428571x + x2 = 0 + 12.85714286 Combine like terms: 0 + 12.85714286 = 12.85714286 5.571428571x + x2 = 12.85714286 The x term is 5.571428571x. Take half its coefficient (2.785714286). Square it (7.760204083) and add it to both sides. Add '7.760204083' to each side of the equation. 5.571428571x + 7.760204083 + x2 = 12.85714286 + 7.760204083 Reorder the terms: 7.760204083 + 5.571428571x + x2 = 12.85714286 + 7.760204083 Combine like terms: 12.85714286 + 7.760204083 = 20.617346943 7.760204083 + 5.571428571x + x2 = 20.617346943 Factor a perfect square on the left side: (x + 2.785714286)(x + 2.785714286) = 20.617346943 Calculate the square root of the right side: 4.540632879 Break this problem into two subproblems by setting (x + 2.785714286) equal to 4.540632879 and -4.540632879.Subproblem 1
x + 2.785714286 = 4.540632879 Simplifying x + 2.785714286 = 4.540632879 Reorder the terms: 2.785714286 + x = 4.540632879 Solving 2.785714286 + x = 4.540632879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.785714286' to each side of the equation. 2.785714286 + -2.785714286 + x = 4.540632879 + -2.785714286 Combine like terms: 2.785714286 + -2.785714286 = 0.000000000 0.000000000 + x = 4.540632879 + -2.785714286 x = 4.540632879 + -2.785714286 Combine like terms: 4.540632879 + -2.785714286 = 1.754918593 x = 1.754918593 Simplifying x = 1.754918593Subproblem 2
x + 2.785714286 = -4.540632879 Simplifying x + 2.785714286 = -4.540632879 Reorder the terms: 2.785714286 + x = -4.540632879 Solving 2.785714286 + x = -4.540632879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.785714286' to each side of the equation. 2.785714286 + -2.785714286 + x = -4.540632879 + -2.785714286 Combine like terms: 2.785714286 + -2.785714286 = 0.000000000 0.000000000 + x = -4.540632879 + -2.785714286 x = -4.540632879 + -2.785714286 Combine like terms: -4.540632879 + -2.785714286 = -7.326347165 x = -7.326347165 Simplifying x = -7.326347165Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.754918593, -7.326347165}
| 4/5y=-12 | | 9/2a=45 | | 5x^3=29 | | 5(2n-3)=(5n+8)+6 | | 7x-3(4x-1)= | | (4)+(4/x) | | -3/8x+4=10 | | 7x-12x-3= | | (x^3+x^2+x+1)(8x-5)= | | 7(x-2)-2(x-3)=3x-2(8-x) | | 7(2n-4)=(6n+7)+2 | | (m-n+k)(m+3n-7k)= | | f/2-19=17 | | 3a+2=2a-3 | | 6x+3=18x | | ((400P-8000)/400P) | | (2x+7)(4x^2+6x+4)= | | ((400X-8000)/400X) | | 3a+1=7 | | x/6=2 | | (x-2)(x^2-9x+8)= | | 6(3n-4)=(7n+1)+2 | | 9(y-5)/2=-3y | | 36x-20-45x+30=-80 | | 7x-5=3x-4+x+8 | | (3x-4)(3x^5-4x^4+5x^3+x^2-4x+3)= | | 5(3x+2)+3=15x+13 | | 7+2(y+1)/3=8y/5 | | 0.20(y-4)+0.02y=0.14y-0.05(10) | | 36x-20-45+30=-80 | | x-6-4x=7x-5-23-2x | | (8t^2-t-8)(5t^2+8t-1)= |