Find all roots of ( x + 1 ) ( x + 3 ) (...

Dayanara Terry

Dayanara Terry

Answered

2022-07-08

Find all roots of
( x + 1 ) ( x + 3 ) ( x + 4 ) ( x + 6 ) = 720

Answer & Explanation

Sariah Glover

Sariah Glover

Expert

2022-07-09Added 16 answers

Actually you can use your method: ( x 2 + 7 x + 6 ) ( x 2 + 7 x + 12 ) = 720 and now let x 2 + 7 x + 9 = u
Then ( u 3 ) ( u + 3 ) = 720 which gives two values for u. This is easier than the other method I suggested.

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