If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying x2 + -8x + 21 = 0 Reorder the terms: 21 + -8x + x2 = 0 Solving 21 + -8x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-21' to each side of the equation. 21 + -8x + -21 + x2 = 0 + -21 Reorder the terms: 21 + -21 + -8x + x2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -8x + x2 = 0 + -21 -8x + x2 = 0 + -21 Combine like terms: 0 + -21 = -21 -8x + x2 = -21 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -21 + 16 Reorder the terms: 16 + -8x + x2 = -21 + 16 Combine like terms: -21 + 16 = -5 16 + -8x + x2 = -5 Factor a perfect square on the left side: (x + -4)(x + -4) = -5 Can't calculate square root of the right side. The solution to this equation could not be determined.
| (3t^-1/4)-(t^2) | | (4x*9x^1/2)-(6*x1/3) | | 13/5=x/3 | | 4+x+1+12x= | | 23-3x+6x=-4 | | -3(4s-2)-6=-3(8s+1)-4 | | 3x/5+24/5+x/6+11/6=12 | | 5=(6-x)/3 | | 8d+3d+6d+8=6d | | -7m+5+10+6m= | | 6/14*(-10/35) | | (3x/5+24/5)+(x/6+11/6)=12 | | K+9+11+7k= | | x^2+40x-80=0 | | 16x^2-64x+64=0 | | x=6+21/7 | | 16x^2-64t+64=0 | | -3(4s-1)-3=-2(9s+8)-3 | | 4x-6+6= | | 6x+5=13x-77 | | 3(x-2)=75-6x | | 5-2(2x+4)=5x+5(x-9) | | 10v*3v^3= | | 1/4b+5-3/4b=6 | | 4x-3=87-11x | | 2+3(3n-3)=20 | | -2xy+5y-2y-4xy= | | 5-23=9x-6-8x | | 6r^2-3r+2r^2*4r^2= | | ((2x+3)/(3))*((4x+6)/(6)) | | 5=10lnX | | x/4-21/4x=-1 |