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Simplifying 7x2 + 9 = -2x Reorder the terms: 9 + 7x2 = -2x Solving 9 + 7x2 = -2x Solving for variable 'x'. Reorder the terms: 9 + 2x + 7x2 = -2x + 2x Combine like terms: -2x + 2x = 0 9 + 2x + 7x2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 1.285714286 + 0.2857142857x + x2 = 0 Move the constant term to the right: Add '-1.285714286' to each side of the equation. 1.285714286 + 0.2857142857x + -1.285714286 + x2 = 0 + -1.285714286 Reorder the terms: 1.285714286 + -1.285714286 + 0.2857142857x + x2 = 0 + -1.285714286 Combine like terms: 1.285714286 + -1.285714286 = 0.000000000 0.000000000 + 0.2857142857x + x2 = 0 + -1.285714286 0.2857142857x + x2 = 0 + -1.285714286 Combine like terms: 0 + -1.285714286 = -1.285714286 0.2857142857x + x2 = -1.285714286 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 = -1.285714286 + 0.02040816328 Reorder the terms: 0.02040816328 + 0.2857142857x + x2 = -1.285714286 + 0.02040816328 Combine like terms: -1.285714286 + 0.02040816328 = -1.26530612272 0.02040816328 + 0.2857142857x + x2 = -1.26530612272 Factor a perfect square on the left side: (x + 0.1428571429)(x + 0.1428571429) = -1.26530612272 Can't calculate square root of the right side. The solution to this equation could not be determined.
| (5/8)h=150 | | 4v^2-40=6v | | 5/8h=150 | | -2(x+4)-8=3(x-7) | | f(x)=9x^3-81x^2-x+9 | | 1.7-0.3m=2+1.7m | | 12370=500x+120 | | 2370=500x+112 | | x-15.1=-7.6 | | r/-53=-156 | | 2a-7whena=6 | | 349.5=50x+112 | | 3x+20+10+15=180 | | a/b=8/15*2 | | 349.5=50*4.75+b | | 15x+26.50=.25x+14.50 | | 5-9+25(98+56-2+x)= | | 1/b=8/15*2 | | 50+x=240 | | .50+x=240 | | 6(x-1)-(4-x)=7x-8 | | x^4+x+1=0 | | x+3x+-5x+6x=100 | | 5(8+x)+12= | | 2370=4.75*500+b | | -2(-1)-5=-7 | | 349.5=4.75*50+b | | 2370=4.5*500+b | | 12ln(-6x)=-24 | | 3d^2-4d-3=0 | | 2(-1-6)+10(-1)=8(-1-2) | | 349.5=4.5*50+b |