a²+1sobre4²
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Anônimo:
(a² + 1)/4² = ?
Respostas
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1
a² + 1 a² + 1
----------- = ----------
4² 16
*********************
= (3x - 2).(3x + 2) - 9x² + 6
= 9x² + 6x - 6x - 4 - 9x² + 6
= 9x² - 9x² + 6x - 6x - 4 + 6
= 6 - 4
= 2
************************
(x + y).(x + y) = x² + xy + xy + y² = x² + 2xy + y²
********************
(y - 7).(y + 7) = y² + 7y - 7y - 7.7 = y² - 49
***************
(x + 3).(x - 3) = x² - 9
**********************
(2x + 5).(2x - 5) = (2x)² - 5² = 4x² - 25
********************************
= (9x² + 6).(9x² - 6) = (9x²)² - 6.6 = 81x⁴ - 36
******************
= (5x - 2).(5x + 2) + 25x² + 4
= (5x)² - 2.2 + 25x² + 4
= 25x² - 4 + 25x² + 4
= 50x²
********************************************
= (8x + 8).(8x - 8) - 64x² + 64 + 4x
= (8x)² - 8.8 - 64x² + 64 + 4x
= 64x² - 64 - 64x² + 64 + 4x
= 64x² - 64x² - 64 + 64 + 4x
= 4x
(x - 7)² = x² - 2.7x +49 = x² - 14x + 49
(y - 3)² = y² - 2.3y + 9 = y² - 6y + 9
(x - y)² = x² - 2xy + y²
----------- = ----------
4² 16
*********************
= (3x - 2).(3x + 2) - 9x² + 6
= 9x² + 6x - 6x - 4 - 9x² + 6
= 9x² - 9x² + 6x - 6x - 4 + 6
= 6 - 4
= 2
************************
(x + y).(x + y) = x² + xy + xy + y² = x² + 2xy + y²
********************
(y - 7).(y + 7) = y² + 7y - 7y - 7.7 = y² - 49
***************
(x + 3).(x - 3) = x² - 9
**********************
(2x + 5).(2x - 5) = (2x)² - 5² = 4x² - 25
********************************
= (9x² + 6).(9x² - 6) = (9x²)² - 6.6 = 81x⁴ - 36
******************
= (5x - 2).(5x + 2) + 25x² + 4
= (5x)² - 2.2 + 25x² + 4
= 25x² - 4 + 25x² + 4
= 50x²
********************************************
= (8x + 8).(8x - 8) - 64x² + 64 + 4x
= (8x)² - 8.8 - 64x² + 64 + 4x
= 64x² - 64 - 64x² + 64 + 4x
= 64x² - 64x² - 64 + 64 + 4x
= 4x
(x - 7)² = x² - 2.7x +49 = x² - 14x + 49
(y - 3)² = y² - 2.3y + 9 = y² - 6y + 9
(x - y)² = x² - 2xy + y²
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