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(ax+1)²=(ax)²+2(ax)(1)+1² = a²x²+2ax+1
2)identidad===> (a-b)²=a²-2ab+b²
(ax-b)² = (ax)²-2(ax)(b)+b² = a²x²-2axb+b²
3)identidad===> (a-b)² = a²-2ab+b²
(3x-2)²= (3x)²-2(3x)(2)+2² = 3²x²-2(6x)+4 = 9x²-12x+4
4)identidad) ==> a²-b²=(a+b)(a-b)
(2x+5)(2x-5) = (2x)²-(5)² = 4x²-25