Susan R.
asked • 06/16/21help plz and thankyou
expand (6a+5) ^2 +(6a-5) ^2 =49
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1 Expert Answer
Distribute/FOIL twice.
(6a+5)(6a+5) + (6a-5)(6a-5) =49
36a^2 + 60a + 25 + 36a^2 - 60a + 25 = 49
Combine like terms.
72a^2 + 50 = 49
72a^2 +1 = 0
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Mark M.
Do you know how to multiply two binomials?06/16/21