(4a-b²)(-2b)=?
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(4a-b²)(-2b)=?
(4a-b²)(-2b)=?
(4a-b²)(-2b)=?
(4a-b²)(-2b)=4a(-2b)-b²(-2b)=-8ab+2b³;
=4a×(-2b)-b²(-2b)
=2b³-8ab
(4a-b²)(-2b)
=2b³-8ab
(4a-b²)(-2b)=?
(4a-b²)(-2b)=?
(4a-b²)(-2b)=?
(4a-b²)(-2b)=4a(-2b)-b²(-2b)=-8ab+2b³;
=4a×(-2b)-b²(-2b)
=2b³-8ab
(4a-b²)(-2b)
=2b³-8ab