If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying 7x2 + 12x + 21 = 0 Reorder the terms: 21 + 12x + 7x2 = 0 Solving 21 + 12x + 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'. 3 + 1.714285714x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + 1.714285714x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + 1.714285714x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 1.714285714x + x2 = 0 + -3 1.714285714x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 1.714285714x + x2 = -3 The x term is 1.714285714x. Take half its coefficient (0.857142857). Square it (0.7346938773) and add it to both sides. Add '0.7346938773' to each side of the equation. 1.714285714x + 0.7346938773 + x2 = -3 + 0.7346938773 Reorder the terms: 0.7346938773 + 1.714285714x + x2 = -3 + 0.7346938773 Combine like terms: -3 + 0.7346938773 = -2.2653061227 0.7346938773 + 1.714285714x + x2 = -2.2653061227 Factor a perfect square on the left side: (x + 0.857142857)(x + 0.857142857) = -2.2653061227 Can't calculate square root of the right side. The solution to this equation could not be determined.
| 110+2r=20 | | r-40=-14 | | .4x-2.6=1.6x+2.7 | | 9=21-c/9 | | 144=18x+x^2 | | 199-6x=2x+23 | | 8-y/15=12 | | 4-6x=9-7x | | -5=c/8-12 | | 4d^2-8d+3=0 | | 3(2x+5)=8x-9 | | 27c-33d= | | 4v^2-28vw+49w^2= | | 38-a/11=34 | | 3x+5y=74 | | t^2+9t=-20 | | 3x+1=2(3x+5) | | 2a^2-ab-10b^2= | | 3x+13=69-5x | | -32x^2-28x=0 | | -3(5x-8)+4=-15x+28 | | n/7-5=4 | | 4x-3=15x-33 | | 2x+13= | | 5r-140=-15 | | 8a+4=12 | | w+3=4w | | a^2-15w+44=0 | | x/5+11=18 | | -3p^2+17p+20=0 | | 5x+6x^2-19=0 | | x/3+3= |