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b.x^2-8x+7x-56
x² + 9x + 4x + 36
x² + 13x + 36
b. (x + 7)(x - 8)
x² - 8x + 7x - 56
x² - x - 56
c. (x - 12)(x - 3)
x² - 3x - 12x + 36
x² - 15x + 36
d. (x - 14)(x + 6)
x² + 6x - 14x - 84
x² - 8x - 84
e. (4x+ 3)(3x - 5)
12x² - 20x + 9x - 15
12x² - 11x - 15
f. (-6x + 5)(2x + 9)
-12x² - 54x + 10x + 45
-12x² - 44x + 45
a. (2x + 3)(x² + 5x - 4)
2x³ + 10x² - 8x + 3x² + 15x - 12
2x³ + 10x² + 3x² - 8x + 15x - 12
2x³ + 12x² + 7x - 12
b. (3x - 5)(3x² - x+ 7)
9x³ - 3x² + 21x - 15x² + 5x - 35
9x³ - 3x² - 15x² + 21x + 5x - 35
9x³ - 18x² + 26x - 35
c. (a + b)(a² - ab - b²)
a³ - a²b - ab² + a²b - ab² - b³
a³ - a²b + a²b -ab² -ab² - b³
a³ - 2ab - b³
d. (5x + 6)(x - 4) - (x + 4)²
5x² - 20x + 6x - 24 - (x + 4)(x + 4)
5x² - 14x - 24 - (x² + 4x + 4x + 16)
5x² - 14x - 24 - (x² + 8x + 16)
5x² - 14x - 24 - x² - 8x - 16
5x² - x² - 14x - 8x - 24 - 16
4x² - 22x - 40