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【单选题】
利用图形中面积的等量关系可以得到某些数学公式,例如,根据图甲,我们可以得到两数和的平方公式:( a + b ) 2 = a 2 +2 ab + b 2 .你根据图得到的数学公式是( )A.
a 2 ﹣ b 2 = （ a ﹣ b ） 2
B.
（ a + b ） 2 = a 2 +2 ab + b 2
C.
（ a ﹣ b ） 2 = a 2 ﹣ 2 ab + b 2
D.
a 2 ﹣ b 2 = （ a+b ）（ a ﹣ b ）
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