8z(z^2+5z-3)+5z(-4z^2+z)=

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Solution for 8z(z^2+5z-3)+5z(-4z^2+z)= equation:


Simplifying
8z(z2 + 5z + -3) + 5z(-4z2 + z) = 0

Reorder the terms:
8z(-3 + 5z + z2) + 5z(-4z2 + z) = 0
(-3 * 8z + 5z * 8z + z2 * 8z) + 5z(-4z2 + z) = 0
(-24z + 40z2 + 8z3) + 5z(-4z2 + z) = 0

Reorder the terms:
-24z + 40z2 + 8z3 + 5z(z + -4z2) = 0
-24z + 40z2 + 8z3 + (z * 5z + -4z2 * 5z) = 0
-24z + 40z2 + 8z3 + (5z2 + -20z3) = 0

Reorder the terms:
-24z + 40z2 + 5z2 + 8z3 + -20z3 = 0

Combine like terms: 40z2 + 5z2 = 45z2
-24z + 45z2 + 8z3 + -20z3 = 0

Combine like terms: 8z3 + -20z3 = -12z3
-24z + 45z2 + -12z3 = 0

Solving
-24z + 45z2 + -12z3 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), '3z'.
3z(-8 + 15z + -4z2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'z' equal to zero and attempt to solve: Simplifying z = 0 Solving z = 0 Move all terms containing z to the left, all other terms to the right. Simplifying z = 0

Subproblem 2

Set the factor '(-8 + 15z + -4z2)' equal to zero and attempt to solve: Simplifying -8 + 15z + -4z2 = 0 Solving -8 + 15z + -4z2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. 2 + -3.75z + z2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + -3.75z + -2 + z2 = 0 + -2 Reorder the terms: 2 + -2 + -3.75z + z2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -3.75z + z2 = 0 + -2 -3.75z + z2 = 0 + -2 Combine like terms: 0 + -2 = -2 -3.75z + z2 = -2 The z term is -3.75z. Take half its coefficient (-1.875). Square it (3.515625) and add it to both sides. Add '3.515625' to each side of the equation. -3.75z + 3.515625 + z2 = -2 + 3.515625 Reorder the terms: 3.515625 + -3.75z + z2 = -2 + 3.515625 Combine like terms: -2 + 3.515625 = 1.515625 3.515625 + -3.75z + z2 = 1.515625 Factor a perfect square on the left side: (z + -1.875)(z + -1.875) = 1.515625 Calculate the square root of the right side: 1.231107225 Break this problem into two subproblems by setting (z + -1.875) equal to 1.231107225 and -1.231107225.

Subproblem 1

z + -1.875 = 1.231107225 Simplifying z + -1.875 = 1.231107225 Reorder the terms: -1.875 + z = 1.231107225 Solving -1.875 + z = 1.231107225 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + z = 1.231107225 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + z = 1.231107225 + 1.875 z = 1.231107225 + 1.875 Combine like terms: 1.231107225 + 1.875 = 3.106107225 z = 3.106107225 Simplifying z = 3.106107225

Subproblem 2

z + -1.875 = -1.231107225 Simplifying z + -1.875 = -1.231107225 Reorder the terms: -1.875 + z = -1.231107225 Solving -1.875 + z = -1.231107225 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + z = -1.231107225 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + z = -1.231107225 + 1.875 z = -1.231107225 + 1.875 Combine like terms: -1.231107225 + 1.875 = 0.643892775 z = 0.643892775 Simplifying z = 0.643892775

Solution

The solution to the problem is based on the solutions from the subproblems. z = {3.106107225, 0.643892775}

Solution

z = {0, 3.106107225, 0.643892775}

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