计算 (1) (3x+1)^2×(3x-1)^2 (2) 4-(-2)^-2-3^2÷(3.14-π)^0
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计算 (1) (3x+1)^2×(3x-1)^2 (2) 4-(-2)^-2-3^2÷(3.14-π)^0
计算 (1) (3x+1)^2×(3x-1)^2 (2) 4-(-2)^-2-3^2÷(3.14-π)^0
计算 (1) (3x+1)^2×(3x-1)^2 (2) 4-(-2)^-2-3^2÷(3.14-π)^0
(3x+1)^2×(3x-1)^2
=(9x^2-1)^2
=81x^4-18x^2+1
4-(-2)^-2-3^2÷(3.14-π)^0
=4-1/4-9÷1
=3.75-9
=-5.25
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