(7+r)(7+r-3r^2)=

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Solution for (7+r)(7+r-3r^2)= equation: 


Simplifying
(7 + r)(7 + r + -3r2) = 0

Multiply (7 + r) * (7 + r + -3r2)
(7(7 + r + -3r2) + r(7 + r + -3r2)) = 0
((7 * 7 + r * 7 + -3r2 * 7) + r(7 + r + -3r2)) = 0
((49 + 7r + -21r2) + r(7 + r + -3r2)) = 0
(49 + 7r + -21r2 + (7 * r + r * r + -3r2 * r)) = 0
(49 + 7r + -21r2 + (7r + r2 + -3r3)) = 0

Reorder the terms:
(49 + 7r + 7r + -21r2 + r2 + -3r3) = 0

Combine like terms: 7r + 7r = 14r
(49 + 14r + -21r2 + r2 + -3r3) = 0

Combine like terms: -21r2 + r2 = -20r2
(49 + 14r + -20r2 + -3r3) = 0

Solving
49 + 14r + -20r2 + -3r3 = 0

Solving for variable 'r'.

The solution to this equation could not be determined.

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