needsdarkness6016
25.08.2019 •
Mathematics
Verify: ( a - 5 )( a +5 ) =a^2 - 25. can someone me figure out to do this?
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Ответ:
(a - 5) (a + 5) = (a*a + a*5) + (-5*a + -5*5)
= a^2 + 5a - 5a - 25
= a^2 - 25
Ответ:
(a² + 5a - 5a - 25) = a² - 25
a² - 25 = a² - 25
Ответ:
Step-by-step explanation: 9