Question

Use the foil method to find the product
(2x^5-7)(x^9-7)=

Answer 1

First \[2x^5 \times x^9 = 2x^{14}\]

Outside

\[2x^5 \times - 7 = -14x^5\]

Inside

\[-7 \times x^9 = -7x^9\]

Last

\[-7 \times -7 = 49\]

combine the terms


\[(2x^2 - 7)(x^9 - 7) = 2x^{14} - 14x^5 - 7x^9 + 49\]