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A. 5² - 8x - 2x² + 3x
=5² - 8x + 3x - 2x²
=5² - 5x -2x²
B. 3 (x² - 3x) - 4 (x - 6)
=3x² - 9x - 4x + 24
=3x² - 13x + 24
C. 2x (x - y) + 6(x² - 4x + 6y)
=2x² - 2xy + 6x² - 24x + 36y
=2x² + 6x² - 2xy - 24x + 36y
= 8x² - 2xy - 24x + 36y
4. A. (4x-3) (2x+4)=(4x+2x) (4-3)=6x+1
B. (2x-4) (3x^2 - 3x + 2) = (2x-3x) (2-4) (3x^2) = -1x-2+3x^2
D. =8x^2 2y 4z^2
2x^6 y^3 z
= 4x^-4 2y^-1 4z