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Simplifying 7x2 + 2x + 5 = 0 Reorder the terms: 5 + 2x + 7x2 = 0 Solving 5 + 2x + 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'. 0.7142857143 + 0.2857142857x + x2 = 0 Move the constant term to the right: Add '-0.7142857143' to each side of the equation. 0.7142857143 + 0.2857142857x + -0.7142857143 + x2 = 0 + -0.7142857143 Reorder the terms: 0.7142857143 + -0.7142857143 + 0.2857142857x + x2 = 0 + -0.7142857143 Combine like terms: 0.7142857143 + -0.7142857143 = 0.0000000000 0.0000000000 + 0.2857142857x + x2 = 0 + -0.7142857143 0.2857142857x + x2 = 0 + -0.7142857143 Combine like terms: 0 + -0.7142857143 = -0.7142857143 0.2857142857x + x2 = -0.7142857143 The x term is 0.2857142857x. Take half its coefficient (0.1428571429). Square it (0.02040816328) and add it to both sides. Add '0.02040816328' to each side of the equation. 0.2857142857x + 0.02040816328 + x2 = -0.7142857143 + 0.02040816328 Reorder the terms: 0.02040816328 + 0.2857142857x + x2 = -0.7142857143 + 0.02040816328 Combine like terms: -0.7142857143 + 0.02040816328 = -0.69387755102 0.02040816328 + 0.2857142857x + x2 = -0.69387755102 Factor a perfect square on the left side: (x + 0.1428571429)(x + 0.1428571429) = -0.69387755102 Can't calculate square root of the right side. The solution to this equation could not be determined.
| g(x)=x^2-5g(h+1) | | 8=-2x | | k+6=8 | | x^2+7x+15=5 | | k= | | (t+7)(t-9)=0 | | -8=x-9 | | x=h^2-3 | | 2w+2[w+90]=380 | | 14-(3m-30)=15m-10 | | w^2=4w+5 | | x-6=3x-18 | | 0.16n+3-0.4n=0.31n-0.3 | | 40=2(x+1)-10 | | 2w+2[5w+10]=380 | | 0=8x^2-45x+64 | | 18x=2100 | | 4(3+c)=3(c-2) | | 0.7(4p+63)=2.8+44.1 | | 2w+2[2w-40]=220 | | v+7=14 | | 15(3x-7)+10(3-5x)=6(3-6x) | | 2p=0.4 | | 2x+30=x | | 20y^2+23y+6=0 | | 2w+2[3w-12]=640 | | 4x+20=120 | | w^2+5w-84=0 | | 2t^2+21t+54=0 | | -b=12.5 | | 2w+2[w+20]=380 | | 8p=27 |