ejercicios de trinomio cuadrado perfecto , ayuda por favor
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(a+b)² =
(a²)+2(a)(b)+(b)² =
a²+2ab+b²
--------------------------------
(3x-5)² =
(3x)²+2(3x)(-5)+(-5)² =
9x²-30x+25
-------------------------------
(3ab²-7rh³)² =
(3ab²)²+2(3ab²)(-7rh³)+(-7rh³)² =
9a²b⁴-42ab²h³r+49h⁶r²
(a²)+2(a)(b)+(b)² =
a²+2ab+b²
--------------------------------
(3x-5)² =
(3x)²+2(3x)(-5)+(-5)² =
9x²-30x+25
-------------------------------
(3ab²-7rh³)² =
(3ab²)²+2(3ab²)(-7rh³)+(-7rh³)² =
9a²b⁴-42ab²h³r+49h⁶r²
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