Factoring by Use of Grouping
Algebra
Level
pending
Factor 4x² + 4xy + y² - 9a² - 12at - 4t²
The answer is 6.
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1 solution
(4x² + 4xy + y²) - (9a² + 12at + 4t²)
(2x + y)² - (3a + 2t)²
[(2xy) + (3a + 2t)] [(2xy + y) - (3a + 2t)]
(2x + y + 3a + 2t) (2x + y - 3a - 2t)
2 + 1 + 3 + 2 * 2 + 1 - 3 - 2 = 6