(2x+5)^2=4x^2+10x+25
(6x-7y)(6x+7y)=6x^2-7y^2
(3a-8)^2=9a^2-24a+64
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(2x+5)^2=4x^2+10x+25
(6x-7y)(6x+7y)=6x^2-7y^2
(3a-8)^2=9a^2-24a+64