(r^2+r-1)(r^2+6r-8)=0

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Solution for (r^2+r-1)(r^2+6r-8)=0 equation:


Simplifying
(r2 + r + -1)(r2 + 6r + -8) = 0

Reorder the terms:
(-1 + r + r2)(r2 + 6r + -8) = 0

Reorder the terms:
(-1 + r + r2)(-8 + 6r + r2) = 0

Multiply (-1 + r + r2) * (-8 + 6r + r2)
(-1(-8 + 6r + r2) + r(-8 + 6r + r2) + r2(-8 + 6r + r2)) = 0
((-8 * -1 + 6r * -1 + r2 * -1) + r(-8 + 6r + r2) + r2(-8 + 6r + r2)) = 0
((8 + -6r + -1r2) + r(-8 + 6r + r2) + r2(-8 + 6r + r2)) = 0
(8 + -6r + -1r2 + (-8 * r + 6r * r + r2 * r) + r2(-8 + 6r + r2)) = 0
(8 + -6r + -1r2 + (-8r + 6r2 + r3) + r2(-8 + 6r + r2)) = 0
(8 + -6r + -1r2 + -8r + 6r2 + r3 + (-8 * r2 + 6r * r2 + r2 * r2)) = 0
(8 + -6r + -1r2 + -8r + 6r2 + r3 + (-8r2 + 6r3 + r4)) = 0

Reorder the terms:
(8 + -6r + -8r + -1r2 + 6r2 + -8r2 + r3 + 6r3 + r4) = 0

Combine like terms: -6r + -8r = -14r
(8 + -14r + -1r2 + 6r2 + -8r2 + r3 + 6r3 + r4) = 0

Combine like terms: -1r2 + 6r2 = 5r2
(8 + -14r + 5r2 + -8r2 + r3 + 6r3 + r4) = 0

Combine like terms: 5r2 + -8r2 = -3r2
(8 + -14r + -3r2 + r3 + 6r3 + r4) = 0

Combine like terms: r3 + 6r3 = 7r3
(8 + -14r + -3r2 + 7r3 + r4) = 0

Solving
8 + -14r + -3r2 + 7r3 + r4 = 0

Solving for variable 'r'.

The solution to this equation could not be determined.

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