If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying -4.9x2 + 21.28x + -15 = 0 Reorder the terms: -15 + 21.28x + -4.9x2 = 0 Solving -15 + 21.28x + -4.9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -4.9 the coefficient of the squared term: Divide each side by '-4.9'. 3.06122449 + -4.342857143x + x2 = 0 Move the constant term to the right: Add '-3.06122449' to each side of the equation. 3.06122449 + -4.342857143x + -3.06122449 + x2 = 0 + -3.06122449 Reorder the terms: 3.06122449 + -3.06122449 + -4.342857143x + x2 = 0 + -3.06122449 Combine like terms: 3.06122449 + -3.06122449 = 0.00000000 0.00000000 + -4.342857143x + x2 = 0 + -3.06122449 -4.342857143x + x2 = 0 + -3.06122449 Combine like terms: 0 + -3.06122449 = -3.06122449 -4.342857143x + x2 = -3.06122449 The x term is -4.342857143x. Take half its coefficient (-2.171428572). Square it (4.715102043) and add it to both sides. Add '4.715102043' to each side of the equation. -4.342857143x + 4.715102043 + x2 = -3.06122449 + 4.715102043 Reorder the terms: 4.715102043 + -4.342857143x + x2 = -3.06122449 + 4.715102043 Combine like terms: -3.06122449 + 4.715102043 = 1.653877553 4.715102043 + -4.342857143x + x2 = 1.653877553 Factor a perfect square on the left side: (x + -2.171428572)(x + -2.171428572) = 1.653877553 Calculate the square root of the right side: 1.286031708 Break this problem into two subproblems by setting (x + -2.171428572) equal to 1.286031708 and -1.286031708.Subproblem 1
x + -2.171428572 = 1.286031708 Simplifying x + -2.171428572 = 1.286031708 Reorder the terms: -2.171428572 + x = 1.286031708 Solving -2.171428572 + x = 1.286031708 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.171428572' to each side of the equation. -2.171428572 + 2.171428572 + x = 1.286031708 + 2.171428572 Combine like terms: -2.171428572 + 2.171428572 = 0.000000000 0.000000000 + x = 1.286031708 + 2.171428572 x = 1.286031708 + 2.171428572 Combine like terms: 1.286031708 + 2.171428572 = 3.45746028 x = 3.45746028 Simplifying x = 3.45746028Subproblem 2
x + -2.171428572 = -1.286031708 Simplifying x + -2.171428572 = -1.286031708 Reorder the terms: -2.171428572 + x = -1.286031708 Solving -2.171428572 + x = -1.286031708 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.171428572' to each side of the equation. -2.171428572 + 2.171428572 + x = -1.286031708 + 2.171428572 Combine like terms: -2.171428572 + 2.171428572 = 0.000000000 0.000000000 + x = -1.286031708 + 2.171428572 x = -1.286031708 + 2.171428572 Combine like terms: -1.286031708 + 2.171428572 = 0.885396864 x = 0.885396864 Simplifying x = 0.885396864Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.45746028, 0.885396864}
| -3(v-8)=5(v+1) | | 0.8x-2.5=0.7 | | -6=2w+10 | | -9x+2+10x=13+22 | | 7x+7=3x+27 | | 180+17w=350 | | 3x-4y=45z | | 3x+0.20y=7 | | 12y-15=33 | | 63*.1=x | | -5(t-1)+9t=8t-3 | | 3u-8=5u-14 | | -3(2z+-8)+10z=16 | | -2-5(2-4m)=33+5m | | -3z(2z-8)+10z=16 | | 11-4=7p-4p+8 | | .8(3x-2)-2.5=-.5(3x-7) | | 6t+2=18 | | 3(2x-5)+4=6x-11 | | 7.3+5.7x=x+32.2 | | -5+10=-15 | | -6x-12=-54 | | 10d-6=4d-16 | | -5c^3+31c^2-48c=0 | | 9+4x=7x+3 | | 8x+7=8(x-4) | | (x+-5)(x+3)=0 | | 894k-40=-5k-32 | | 8z-z=-1+5z-1-2 | | 5(t-2)+5t=5(2t+2)-8 | | 2-10=2 | | 3(x-4)=2(2x-7) |