(s-7)(s+4)=0

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Solution for (s-7)(s+4)=0 equation:


Simplifying
(s + -7)(s + 4) = 0

Reorder the terms:
(-7 + s)(s + 4) = 0

Reorder the terms:
(-7 + s)(4 + s) = 0

Multiply (-7 + s) * (4 + s)
(-7(4 + s) + s(4 + s)) = 0
((4 * -7 + s * -7) + s(4 + s)) = 0
((-28 + -7s) + s(4 + s)) = 0
(-28 + -7s + (4 * s + s * s)) = 0
(-28 + -7s + (4s + s2)) = 0

Combine like terms: -7s + 4s = -3s
(-28 + -3s + s2) = 0

Solving
-28 + -3s + s2 = 0

Solving for variable 's'.

Factor a trinomial.
(-4 + -1s)(7 + -1s) = 0

Subproblem 1

Set the factor '(-4 + -1s)' equal to zero and attempt to solve: Simplifying -4 + -1s = 0 Solving -4 + -1s = 0 Move all terms containing s to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1s = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1s = 0 + 4 -1s = 0 + 4 Combine like terms: 0 + 4 = 4 -1s = 4 Divide each side by '-1'. s = -4 Simplifying s = -4

Subproblem 2

Set the factor '(7 + -1s)' equal to zero and attempt to solve: Simplifying 7 + -1s = 0 Solving 7 + -1s = 0 Move all terms containing s to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1s = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1s = 0 + -7 -1s = 0 + -7 Combine like terms: 0 + -7 = -7 -1s = -7 Divide each side by '-1'. s = 7 Simplifying s = 7

Solution

s = {-4, 7}

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