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a) 5(n - 4) = 5n-20
b) (2x - 3)(x - 5) = 2x²-10x-3x+15 = 2x²-13x+15
c) (2x + 1) - (2x +3)(7x - 5) = 2x+1 -(14x²-10x+21x-15) =2x+1 -14x²-11x+15 = -14x² -9x+16
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a) 5(n - 4) = 5n-20
b) (2x - 3)(x - 5) = 2x²-10x-3x+15 = 2x²-13x+15
c) (2x + 1) - (2x +3)(7x - 5) = 2x+1 -(14x²-10x+21x-15) =2x+1 -14x²-11x+15 = -14x² -9x+16
c= (2x +1) - (2x +3)(7x -5) = 2x +1 -(14x² -10x +21x -15) = 2x +1 -14x² +10x -21x +15 = -14x² +10x +2x -21x +1 +15 = -14x² -9x +16