Решение:
(х+у)(х-у) = х² - у², тогда
1) (-1/8)² - (1/4)² = 1/64 - 1/16 = 1/64 - 4/64 = - 3/64.
2) (-5/8)² - (-3/4)² = 25/64 - 9/16 = 25/64 - 36/64 = - 11/64.
3) (0,15)² - (-0,75)² = 0,0225 - 0,5625 = - 0,54.
4) (1,32)² - (-1,28)² = 1,7424 - 1,6384 = - 0,104.
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Решение:
(х+у)(х-у) = х² - у², тогда
1) (-1/8)² - (1/4)² = 1/64 - 1/16 = 1/64 - 4/64 = - 3/64.
2) (-5/8)² - (-3/4)² = 25/64 - 9/16 = 25/64 - 36/64 = - 11/64.
3) (0,15)² - (-0,75)² = 0,0225 - 0,5625 = - 0,54.
4) (1,32)² - (-1,28)² = 1,7424 - 1,6384 = - 0,104.