If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying 2r2 + 11r + 15 = -2r2 Reorder the terms: 15 + 11r + 2r2 = -2r2 Solving 15 + 11r + 2r2 = -2r2 Solving for variable 'r'. Combine like terms: 2r2 + 2r2 = 4r2 15 + 11r + 4r2 = -2r2 + 2r2 Combine like terms: -2r2 + 2r2 = 0 15 + 11r + 4r2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 3.75 + 2.75r + r2 = 0 Move the constant term to the right: Add '-3.75' to each side of the equation. 3.75 + 2.75r + -3.75 + r2 = 0 + -3.75 Reorder the terms: 3.75 + -3.75 + 2.75r + r2 = 0 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + 2.75r + r2 = 0 + -3.75 2.75r + r2 = 0 + -3.75 Combine like terms: 0 + -3.75 = -3.75 2.75r + r2 = -3.75 The r term is 2.75r. Take half its coefficient (1.375). Square it (1.890625) and add it to both sides. Add '1.890625' to each side of the equation. 2.75r + 1.890625 + r2 = -3.75 + 1.890625 Reorder the terms: 1.890625 + 2.75r + r2 = -3.75 + 1.890625 Combine like terms: -3.75 + 1.890625 = -1.859375 1.890625 + 2.75r + r2 = -1.859375 Factor a perfect square on the left side: (r + 1.375)(r + 1.375) = -1.859375 Can't calculate square root of the right side. The solution to this equation could not be determined.
| 6p-5q=28 | | (x-4)(x-9)+5x=0 | | Log(3)(3x+4)=4 | | 10p+5q=20 | | 2(1-5x)=62 | | 3-5x=6x+1 | | -8+5b=6b-16 | | 81-x^2=2x^2 | | x/(1-x)=2.43 | | 4x+5+8x=5 | | t^2+8t=-16 | | 6n-3+2n=13 | | x^2-11/4x+15/8=0 | | m+3/4=-1 | | 4x^2-11=14 | | 2*2+x+9=3*3+x+4 | | (x+5)(x-5)=11 | | 4x^2-m^2n^4=0 | | 0=5x^2-16 | | 11x-15=2x+9 | | 11x-15=7x+9 | | x^2+3/2x | | (2x+5/5-2x)=-3 | | a^2-5a=-6 | | x/(6-x)=-1/3 | | x^2+-12x+4=0 | | X/4+6=5 | | 3x/(2x-1)=1/2 | | 10x^2-23+12=0 | | 5(4p+5)=65 | | -1+2a=-4+2a | | 3x/2x-1=1/2 |