If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying -1x2 + -8x + -21 = 0 Reorder the terms: -21 + -8x + -1x2 = 0 Solving -21 + -8x + -1x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-1'. -1(21 + 8x + x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(21 + 8x + x2)' equal to zero and attempt to solve: Simplifying 21 + 8x + x2 = 0 Solving 21 + 8x + x2 = 0 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. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
| 8/y+7=11 | | x+8-x=3x+10-3 | | y=-0.05*0+1.5*0 | | 9x+1+17x-3+78=180 | | -4y+12x=0 | | 3(x+8)=2x+16 | | 3x^4+4x^3-14X^2+4x+3=0 | | 195-7x=38x+20 | | x^2-10x+18.75=0 | | 8x+14x+70=180 | | x/6-6=x/6 | | y=-x^2+3x-4 | | 2(3x+5)-3=16x+7-10x | | x^2-10x-18.75=0 | | 6x-15=4x-45 | | 5x-3=13x+59 | | 5x^1/3+40=0 | | Y+19=20 | | 10X-18X=10 | | 8x/10y=3x/8 | | 7x+18=5x+9 | | (a+7)/9+1=(2a+1)/6 | | 6x-3+3x-6=5x-12+3x+5 | | -131-8x=9x+21 | | 24-4x=17+3x | | X^4-16x-720=0 | | t=9/4p+37 | | 19y=20 | | 21X+2-4=12X+2-12X+2 | | 2x+6-5x=x-2 | | Y+2Y=-3 | | 6x-15=-3 |