I) (3m - 4)2 = (3m)2 – 2 * 3m * 4 + 42 = 9m2 – 24m + 16J) -5x - (7 - 2x) = -5x – 7 + 2x = - 3x - 7 K) (3-a)-(2a-1) = 3 – a - 2a + 1 = 3 + 1 – a – 2a = 4 – 3a
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9m² - 2*3m*-4 + 4*4 = 9m² - 24 m +16
J) -5x - (7 - 2x) = -5x - 7 + 2x = - 3x -7
K) (3-a) - (2a-1) = 3 - a -2a +1 = 3 - 3a +1 = 4 -3a
I) (3m - 4)2 = (3m)2 – 2 * 3m * 4 + 42 = 9m2 – 24m + 16
J) -5x - (7 - 2x) = -5x – 7 + 2x = - 3x - 7
K) (3-a)-(2a-1) = 3 – a - 2a + 1 = 3 + 1 – a – 2a = 4 – 3a