If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying -1x2 + 2x + -21 = 0 Reorder the terms: -21 + 2x + -1x2 = 0 Solving -21 + 2x + -1x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 21 + -2x + x2 = 0 Move the constant term to the right: Add '-21' to each side of the equation. 21 + -2x + -21 + x2 = 0 + -21 Reorder the terms: 21 + -21 + -2x + x2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -2x + x2 = 0 + -21 -2x + x2 = 0 + -21 Combine like terms: 0 + -21 = -21 -2x + x2 = -21 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = -21 + 1 Reorder the terms: 1 + -2x + x2 = -21 + 1 Combine like terms: -21 + 1 = -20 1 + -2x + x2 = -20 Factor a perfect square on the left side: (x + -1)(x + -1) = -20 Can't calculate square root of the right side. The solution to this equation could not be determined.
| 34+146=90 | | 2/3x=5/10 | | 7x^2(13x-1)+13x-1=0 | | 4-(-2)(-5)= | | 3+4+4A=B | | y=cos1/2x | | 3+4+4xA=B | | 2x+10=10x-100 | | 4dy+ydx=x^2dy | | (25+2x)(10+2x)=0 | | -35=x-64 | | 6s+3s=9 | | 5-3x=2(x-5) | | 2(m+2)=5-3 | | 3(12-2)=30+12-2-x-2 | | (7x+1)+(-8x+2)= | | 25x^2*7x-1400=0 | | 3x/4=45/20 | | (-2b-a+4)x=(3a+2b-8) | | 12x^2-9x+2=2x | | 3x^4+3x^3-6x^2-x-3=0 | | 28x^2+16x-80= | | 2/9b | | 7x-6(6-x)=9 | | 86.4=(s+3)+(2s+6) | | 4=2/3w | | 16=2[x-1] | | 2u(2u-7)=18 | | 3y=15/7 | | 198-16y=6 | | 198-16y= | | 4cos^2x+4cosx=2 |