化简:4a(a+1)-(2a+1)x(2a-1)帮帮我解答

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化简:4a(a+1)-(2a+1)x(2a-1)帮帮我解答化简:4a(a+1)-(2a+1)x(2a-1)帮帮我解答化简:4a(a+1)-(2a+1)x(2a-1)帮帮我解答4a(a+1)-(2a+1

化简:4a(a+1)-(2a+1)x(2a-1)帮帮我解答
化简:4a(a+1)-(2a+1)x(2a-1)
帮帮我解答

化简:4a(a+1)-(2a+1)x(2a-1)帮帮我解答
4a(a+1)-(2a+1)x(2a-1)
=4a^2+4a-(4a^2-1) [平方差公式]
=4a+1