=(3f+5)(2f+5)

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Solution for =(3f+5)(2f+5) equation:


Simplifying
0 = (3f + 5)(2f + 5)

Reorder the terms:
0 = (5 + 3f)(2f + 5)

Reorder the terms:
0 = (5 + 3f)(5 + 2f)

Multiply (5 + 3f) * (5 + 2f)
0 = (5(5 + 2f) + 3f * (5 + 2f))
0 = ((5 * 5 + 2f * 5) + 3f * (5 + 2f))
0 = ((25 + 10f) + 3f * (5 + 2f))
0 = (25 + 10f + (5 * 3f + 2f * 3f))
0 = (25 + 10f + (15f + 6f2))

Combine like terms: 10f + 15f = 25f
0 = (25 + 25f + 6f2)

Solving
0 = 25 + 25f + 6f2

Solving for variable 'f'.

Combine like terms: 0 + -25 = -25
-25 + -25f + -6f2 = 25 + 25f + 6f2 + -25 + -25f + -6f2

Reorder the terms:
-25 + -25f + -6f2 = 25 + -25 + 25f + -25f + 6f2 + -6f2

Combine like terms: 25 + -25 = 0
-25 + -25f + -6f2 = 0 + 25f + -25f + 6f2 + -6f2
-25 + -25f + -6f2 = 25f + -25f + 6f2 + -6f2

Combine like terms: 25f + -25f = 0
-25 + -25f + -6f2 = 0 + 6f2 + -6f2
-25 + -25f + -6f2 = 6f2 + -6f2

Combine like terms: 6f2 + -6f2 = 0
-25 + -25f + -6f2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(25 + 25f + 6f2) = 0

Factor a trinomial.
-1((5 + 2f)(5 + 3f)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(5 + 2f)' equal to zero and attempt to solve: Simplifying 5 + 2f = 0 Solving 5 + 2f = 0 Move all terms containing f to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 2f = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 2f = 0 + -5 2f = 0 + -5 Combine like terms: 0 + -5 = -5 2f = -5 Divide each side by '2'. f = -2.5 Simplifying f = -2.5

Subproblem 2

Set the factor '(5 + 3f)' equal to zero and attempt to solve: Simplifying 5 + 3f = 0 Solving 5 + 3f = 0 Move all terms containing f to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 3f = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 3f = 0 + -5 3f = 0 + -5 Combine like terms: 0 + -5 = -5 3f = -5 Divide each side by '3'. f = -1.666666667 Simplifying f = -1.666666667

Solution

f = {-2.5, -1.666666667}

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