2pi(8r)+2pi(r^2)=40pi

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Solution for 2pi(8r)+2pi(r^2)=40pi equation:


Simplifying
2pi(8r) + 2pi(r2) = 40pi

Remove parenthesis around (8r)
2ip * 8r + 2pi(r2) = 40pi

Reorder the terms for easier multiplication:
2 * 8ip * r + 2pi(r2) = 40pi

Multiply 2 * 8
16ip * r + 2pi(r2) = 40pi

Multiply ip * r
16ipr + 2pi(r2) = 40pi

Multiply ip * r2
16ipr + 2ipr2 = 40pi

Solving
16ipr + 2ipr2 = 40ip

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Add '-40ip' to each side of the equation.
16ipr + -40ip + 2ipr2 = 40ip + -40ip

Reorder the terms:
-40ip + 16ipr + 2ipr2 = 40ip + -40ip

Combine like terms: 40ip + -40ip = 0
-40ip + 16ipr + 2ipr2 = 0

Factor out the Greatest Common Factor (GCF), '2ip'.
2ip(-20 + 8r + r2) = 0

Factor a trinomial.
2ip((-10 + -1r)(2 + -1r)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor 'ip' equal to zero and attempt to solve: Simplifying ip = 0 Solving ip = 0 Move all terms containing i to the left, all other terms to the right. Simplifying ip = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(-10 + -1r)' equal to zero and attempt to solve: Simplifying -10 + -1r = 0 Solving -10 + -1r = 0 Move all terms containing i to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -1r = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1r = 0 + 10 -1r = 0 + 10 Combine like terms: 0 + 10 = 10 -1r = 10 Add 'r' to each side of the equation. -1r + r = 10 + r Combine like terms: -1r + r = 0 0 = 10 + r Simplifying 0 = 10 + r The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 3

Set the factor '(2 + -1r)' equal to zero and attempt to solve: Simplifying 2 + -1r = 0 Solving 2 + -1r = 0 Move all terms containing i to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1r = 0 + -2 -1r = 0 + -2 Combine like terms: 0 + -2 = -2 -1r = -2 Add 'r' to each side of the equation. -1r + r = -2 + r Combine like terms: -1r + r = 0 0 = -2 + r Simplifying 0 = -2 + r The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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