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Simplifying x2 + -2x + 5 = -4 Reorder the terms: 5 + -2x + x2 = -4 Solving 5 + -2x + x2 = -4 Solving for variable 'x'. Reorder the terms: 5 + 4 + -2x + x2 = -4 + 4 Combine like terms: 5 + 4 = 9 9 + -2x + x2 = -4 + 4 Combine like terms: -4 + 4 = 0 9 + -2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-9' to each side of the equation. 9 + -2x + -9 + x2 = 0 + -9 Reorder the terms: 9 + -9 + -2x + x2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -2x + x2 = 0 + -9 -2x + x2 = 0 + -9 Combine like terms: 0 + -9 = -9 -2x + x2 = -9 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 = -9 + 1 Reorder the terms: 1 + -2x + x2 = -9 + 1 Combine like terms: -9 + 1 = -8 1 + -2x + x2 = -8 Factor a perfect square on the left side: (x + -1)(x + -1) = -8 Can't calculate square root of the right side. The solution to this equation could not be determined.
| (3-5)=2 | | 7-2x=11+x | | 7+3x+5x-2+7+3x+5x-2= | | -81+3p-7p+5+37= | | y/9=3/4 | | y=4(2)+8 | | -8x-5y=5 | | 3x-4+3x-4+7-2x+7-2x+5x+5= | | v=x(14-2x)(15-x) | | 3.45/2.4 | | 4z+3+4z+3+4z+3+4z+3= | | 4x+3+4z+3+4z+3+4z+3= | | x+2y=2z | | 0.75x+0.05(16-x)=0.10(-118) | | -54/45*10/45 | | 5x-(-2)+4x+(-5x)= | | 5.28+36.9+0.755+7= | | (-9.8)(8.644)(0.6)= | | 6a+14*5=43-a | | (-5)(-7.3)(7)= | | (12-m)(36+3m)(m-12)=0 | | 2n+1+2n+3=-104 | | (-9)(6.3)= | | x+3-2x+7+y= | | C=1/2kv | | 144/233 | | -5=2(6)-17 | | sqrt(4y-1)=sqrt(6y-15) | | 13x+6y=23 | | 2x+3(x+10)=-50 | | (-8.4)(7.9)= | | 7n^2=49n |