s(x)=((30-2x)(30-2x))+(4(30-2x)(x))+((30-2x)(30-2x))-(2)(1)

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Solution for s(x)=((30-2x)(30-2x))+(4(30-2x)(x))+((30-2x)(30-2x))-(2)(1) equation: 


Simplifying
s(x) = ((30 + -2x)(30 + -2x)) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)

Multiply s * x
sx = ((30 + -2x)(30 + -2x)) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)

Multiply (30 + -2x) * (30 + -2x)
sx = ((30(30 + -2x) + -2x * (30 + -2x))) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = (((30 * 30 + -2x * 30) + -2x * (30 + -2x))) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = (((900 + -60x) + -2x * (30 + -2x))) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = ((900 + -60x + (30 * -2x + -2x * -2x))) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = ((900 + -60x + (-60x + 4x2))) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)

Combine like terms: -60x + -60x = -120x
sx = ((900 + -120x + 4x2)) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = (900 + -120x + 4x2) + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)

Remove parenthesis around (900 + -120x + 4x2)
sx = 900 + -120x + 4x2 + (4(30 + -2x)(x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)

Reorder the terms for easier multiplication:
sx = 900 + -120x + 4x2 + (4x(30 + -2x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = 900 + -120x + 4x2 + ((30 * 4x + -2x * 4x)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = 900 + -120x + 4x2 + ((120x + -8x2)) + ((30 + -2x)(30 + -2x)) + -1(2)(1)
sx = 900 + -120x + 4x2 + (120x + -8x2) + ((30 + -2x)(30 + -2x)) + -1(2)(1)

Remove parenthesis around (120x + -8x2)
sx = 900 + -120x + 4x2 + 120x + -8x2 + ((30 + -2x)(30 + -2x)) + -1(2)(1)

Multiply (30 + -2x) * (30 + -2x)
sx = 900 + -120x + 4x2 + 120x + -8x2 + ((30(30 + -2x) + -2x * (30 + -2x))) + -1(2)(1)
sx = 900 + -120x + 4x2 + 120x + -8x2 + (((30 * 30 + -2x * 30) + -2x * (30 + -2x))) + -1(2)(1)
sx = 900 + -120x + 4x2 + 120x + -8x2 + (((900 + -60x) + -2x * (30 + -2x))) + -1(2)(1)
sx = 900 + -120x + 4x2 + 120x + -8x2 + ((900 + -60x + (30 * -2x + -2x * -2x))) + -1(2)(1)
sx = 900 + -120x + 4x2 + 120x + -8x2 + ((900 + -60x + (-60x + 4x2))) + -1(2)(1)

Combine like terms: -60x + -60x = -120x
sx = 900 + -120x + 4x2 + 120x + -8x2 + ((900 + -120x + 4x2)) + -1(2)(1)
sx = 900 + -120x + 4x2 + 120x + -8x2 + (900 + -120x + 4x2) + -1(2)(1)

Remove parenthesis around (900 + -120x + 4x2)
sx = 900 + -120x + 4x2 + 120x + -8x2 + 900 + -120x + 4x2 + -1(2)(1)

Multiply -1 * 2
sx = 900 + -120x + 4x2 + 120x + -8x2 + 900 + -120x + 4x2 + -2 * 1

Multiply -2 * 1
sx = 900 + -120x + 4x2 + 120x + -8x2 + 900 + -120x + 4x2 + -2

Reorder the terms:
sx = 900 + 900 + -2 + -120x + 120x + -120x + 4x2 + -8x2 + 4x2

Combine like terms: 900 + 900 = 1800
sx = 1800 + -2 + -120x + 120x + -120x + 4x2 + -8x2 + 4x2

Combine like terms: 1800 + -2 = 1798
sx = 1798 + -120x + 120x + -120x + 4x2 + -8x2 + 4x2

Combine like terms: -120x + 120x = 0
sx = 1798 + 0 + -120x + 4x2 + -8x2 + 4x2
sx = 1798 + -120x + 4x2 + -8x2 + 4x2

Combine like terms: 4x2 + -8x2 = -4x2
sx = 1798 + -120x + -4x2 + 4x2

Combine like terms: -4x2 + 4x2 = 0
sx = 1798 + -120x + 0
sx = 1798 + -120x

Solving
sx = 1798 + -120x

Solving for variable 's'.

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

Divide each side by 'x'.
s = 1798x-1 + -120

Simplifying
s = 1798x-1 + -120

Reorder the terms:
s = -120 + 1798x-1

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