① 16x2 + 24x + 9 = (4x+3)2
② – 4x2 + 4xy – y2= – (4x2–4xy+y2) = – (2x–y)2
④ 4x2 – 8xy + 4y2= 4 (x2–2xy+y2) = 4 (x–y)2
完全平方公式分解因式(7)
2020-12-22 08:25
完全平方公式分解因式(7).doc
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① 16x2 + 24x + 9 = (4x+3)2
② – 4x2 + 4xy – y2= – (4x2–4xy+y2) = – (2x–y)2
④ 4x2 – 8xy + 4y2= 4 (x2–2xy+y2) = 4 (x–y)2