Z^2+4z-21=(2z+3)(z-7)

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Solution for Z^2+4z-21=(2z+3)(z-7) equation:


Simplifying
Z2 + 4z + -21 = (2z + 3)(z + -7)

Reorder the terms:
-21 + Z2 + 4z = (2z + 3)(z + -7)

Reorder the terms:
-21 + Z2 + 4z = (3 + 2z)(z + -7)

Reorder the terms:
-21 + Z2 + 4z = (3 + 2z)(-7 + z)

Multiply (3 + 2z) * (-7 + z)
-21 + Z2 + 4z = (3(-7 + z) + 2z * (-7 + z))
-21 + Z2 + 4z = ((-7 * 3 + z * 3) + 2z * (-7 + z))
-21 + Z2 + 4z = ((-21 + 3z) + 2z * (-7 + z))
-21 + Z2 + 4z = (-21 + 3z + (-7 * 2z + z * 2z))
-21 + Z2 + 4z = (-21 + 3z + (-14z + 2z2))

Combine like terms: 3z + -14z = -11z
-21 + Z2 + 4z = (-21 + -11z + 2z2)

Add '21' to each side of the equation.
-21 + Z2 + 21 + 4z = -21 + -11z + 21 + 2z2

Reorder the terms:
-21 + 21 + Z2 + 4z = -21 + -11z + 21 + 2z2

Combine like terms: -21 + 21 = 0
0 + Z2 + 4z = -21 + -11z + 21 + 2z2
Z2 + 4z = -21 + -11z + 21 + 2z2

Reorder the terms:
Z2 + 4z = -21 + 21 + -11z + 2z2

Combine like terms: -21 + 21 = 0
Z2 + 4z = 0 + -11z + 2z2
Z2 + 4z = -11z + 2z2

Solving
Z2 + 4z = -11z + 2z2

Solving for variable 'Z'.

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

Add '-4z' to each side of the equation.
Z2 + 4z + -4z = -11z + -4z + 2z2

Combine like terms: 4z + -4z = 0
Z2 + 0 = -11z + -4z + 2z2
Z2 = -11z + -4z + 2z2

Combine like terms: -11z + -4z = -15z
Z2 = -15z + 2z2

Simplifying
Z2 = -15z + 2z2

Reorder the terms:
Z2 + 15z + -2z2 = -15z + 15z + 2z2 + -2z2

Combine like terms: -15z + 15z = 0
Z2 + 15z + -2z2 = 0 + 2z2 + -2z2
Z2 + 15z + -2z2 = 2z2 + -2z2

Combine like terms: 2z2 + -2z2 = 0
Z2 + 15z + -2z2 = 0

The solution to this equation could not be determined.

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