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Simplifying 5x2 + -7x + 4 = 0 Reorder the terms: 4 + -7x + 5x2 = 0 Solving 4 + -7x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 0.8 + -1.4x + x2 = 0 Move the constant term to the right: Add '-0.8' to each side of the equation. 0.8 + -1.4x + -0.8 + x2 = 0 + -0.8 Reorder the terms: 0.8 + -0.8 + -1.4x + x2 = 0 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + -1.4x + x2 = 0 + -0.8 -1.4x + x2 = 0 + -0.8 Combine like terms: 0 + -0.8 = -0.8 -1.4x + x2 = -0.8 The x term is -1.4x. Take half its coefficient (-0.7). Square it (0.49) and add it to both sides. Add '0.49' to each side of the equation. -1.4x + 0.49 + x2 = -0.8 + 0.49 Reorder the terms: 0.49 + -1.4x + x2 = -0.8 + 0.49 Combine like terms: -0.8 + 0.49 = -0.31 0.49 + -1.4x + x2 = -0.31 Factor a perfect square on the left side: (x + -0.7)(x + -0.7) = -0.31 Can't calculate square root of the right side. The solution to this equation could not be determined.
| 6-3(5x+4)= | | 27n^2-54n+15=0 | | y^2=8y+20 | | f(3)=6(3)+9 | | 8x+y=24 | | 98=.50x+28 | | 9x+111=6x+189 | | -6-15x= | | 81-18=x | | 28y^2+43y-48=0 | | 4X^2+48X+92=0 | | 99x+21x-0= | | 2/3x=-9 | | 1/4a-12=32 | | 4(m/2-9)=-40 | | 16x^2=i | | 2.5+h=13.1 | | 3(n+6)+6n=-9(2n+10) | | 6-14x= | | 16y-8=4y+21 | | 5(c+2.2)=10c-1.5 | | 6x-7*-12=42 | | 2x+72=5x+24 | | 3(2-7x)= | | 4/5b=32/3 | | 7x-49=52+2x | | 2y-4.5=1.5y | | 6*0-7y=42 | | a*a=49 | | 6*0-4y=42 | | -6(1+5v)=54 | | 5-.5=5+4n |