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Sally789 Sally789
  • 09-09-2015
  • Mathematics
Answered

3(2x-1)^2-5(4x+1)^2 doe s anyone know how to expand and simplify this?

Verified Answer :

Panoyin
Panoyin Panoyin
  • 09-09-2015

3(2x - 1)² - 5(4x + 1)²
3(2x - 1)(2x - 1) - 5(4x + 1)(4x + 1)
3(2x(2x - 1) - 1(2x - 1)) - 5(4x(4x + 1) + 1(4x + 1))
3(2x(2x) - 2x(1) - 1(2x) + 1(1)) - 5(4x(4x) + 4x(1) + 1(4x) + 1(1))
3x(4x² - 2x - 2x + 1) - 5(16x² + 4x + 4x + 1)
3x(4x² - 4x + 1) - 5(16x² + 8x + 1)
3x(4x²) - 3x(4x) + 3x(1) - 5(16x²) - 5(8x) - 5(1)
12x³ - 12x² + 3x - 80x² - 40x - 5
12x³ - 12x² - 80x² + 3x - 40x - 5
12x³ - 92x² - 37x - 5

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