(21t+7)(9t+1)=0

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Solution for (21t+7)(9t+1)=0 equation:


Simplifying
(21t + 7)(9t + 1) = 0

Reorder the terms:
(7 + 21t)(9t + 1) = 0

Reorder the terms:
(7 + 21t)(1 + 9t) = 0

Multiply (7 + 21t) * (1 + 9t)
(7(1 + 9t) + 21t * (1 + 9t)) = 0
((1 * 7 + 9t * 7) + 21t * (1 + 9t)) = 0
((7 + 63t) + 21t * (1 + 9t)) = 0
(7 + 63t + (1 * 21t + 9t * 21t)) = 0
(7 + 63t + (21t + 189t2)) = 0

Combine like terms: 63t + 21t = 84t
(7 + 84t + 189t2) = 0

Solving
7 + 84t + 189t2 = 0

Solving for variable 't'.

Factor out the Greatest Common Factor (GCF), '7'.
7(1 + 12t + 27t2) = 0

Factor a trinomial.
7((1 + 3t)(1 + 9t)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(1 + 3t)' equal to zero and attempt to solve: Simplifying 1 + 3t = 0 Solving 1 + 3t = 0 Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 3t = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 3t = 0 + -1 3t = 0 + -1 Combine like terms: 0 + -1 = -1 3t = -1 Divide each side by '3'. t = -0.3333333333 Simplifying t = -0.3333333333

Subproblem 2

Set the factor '(1 + 9t)' equal to zero and attempt to solve: Simplifying 1 + 9t = 0 Solving 1 + 9t = 0 Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 9t = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 9t = 0 + -1 9t = 0 + -1 Combine like terms: 0 + -1 = -1 9t = -1 Divide each side by '9'. t = -0.1111111111 Simplifying t = -0.1111111111

Solution

t = {-0.3333333333, -0.1111111111}

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