(-a^2+1)-(a^2-2)+(6a^2-7a+4)=

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Solution for (-a^2+1)-(a^2-2)+(6a^2-7a+4)= equation:


Simplifying
(-1a2 + 1) + -1(a2 + -2) + (6a2 + -7a + 4) = 0

Reorder the terms:
(1 + -1a2) + -1(a2 + -2) + (6a2 + -7a + 4) = 0

Remove parenthesis around (1 + -1a2)
1 + -1a2 + -1(a2 + -2) + (6a2 + -7a + 4) = 0

Reorder the terms:
1 + -1a2 + -1(-2 + a2) + (6a2 + -7a + 4) = 0
1 + -1a2 + (-2 * -1 + a2 * -1) + (6a2 + -7a + 4) = 0
1 + -1a2 + (2 + -1a2) + (6a2 + -7a + 4) = 0

Reorder the terms:
1 + -1a2 + 2 + -1a2 + (4 + -7a + 6a2) = 0

Remove parenthesis around (4 + -7a + 6a2)
1 + -1a2 + 2 + -1a2 + 4 + -7a + 6a2 = 0

Reorder the terms:
1 + 2 + 4 + -7a + -1a2 + -1a2 + 6a2 = 0

Combine like terms: 1 + 2 = 3
3 + 4 + -7a + -1a2 + -1a2 + 6a2 = 0

Combine like terms: 3 + 4 = 7
7 + -7a + -1a2 + -1a2 + 6a2 = 0

Combine like terms: -1a2 + -1a2 = -2a2
7 + -7a + -2a2 + 6a2 = 0

Combine like terms: -2a2 + 6a2 = 4a2
7 + -7a + 4a2 = 0

Solving
7 + -7a + 4a2 = 0

Solving for variable 'a'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
1.75 + -1.75a + a2 = 0

Move the constant term to the right:

Add '-1.75' to each side of the equation.
1.75 + -1.75a + -1.75 + a2 = 0 + -1.75

Reorder the terms:
1.75 + -1.75 + -1.75a + a2 = 0 + -1.75

Combine like terms: 1.75 + -1.75 = 0.00
0.00 + -1.75a + a2 = 0 + -1.75
-1.75a + a2 = 0 + -1.75

Combine like terms: 0 + -1.75 = -1.75
-1.75a + a2 = -1.75

The a term is -1.75a.  Take half its coefficient (-0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
-1.75a + 0.765625 + a2 = -1.75 + 0.765625

Reorder the terms:
0.765625 + -1.75a + a2 = -1.75 + 0.765625

Combine like terms: -1.75 + 0.765625 = -0.984375
0.765625 + -1.75a + a2 = -0.984375

Factor a perfect square on the left side:
(a + -0.875)(a + -0.875) = -0.984375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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