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2013-03-15T16:36:46+01:00

1.A = (5x-13)²

2. B (5x-13)(5x+13)

3.2A +3B = 2(5x-13)² + 3(5x-13)(5x+13) = (5x-13)(10x-26+15x+39) = (5x-13)(25x+13)

4. A(-3/5) = (-16)² = 256

    B(2V3) = 25.4.3 - 169 = 300 - 169 = 131