Posted by admin at March 5, 2019
12a + 26b -4b – 16a. = 12a – 16a + 26b – 4b. = -4a + 22b.
(x – 4)(x + 5). = x(x + 5) -4(x + 5). = x2 + 5x – 4x – 20. = x2 + x - 20.
5x2 – 15x – 20. = 5(x2 – 3x – 4). = 5(x2 – 4x + x – 4).
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