−3x9+12x8+6x4
(Take 12 times 16 and take away 3 times 20 plus 6 times 4.)
=(3x4)(4x4+−x5+2)
=(3x4)(4x4)+(3x4)(−x5)+(3x4)(2)
=12x8−3x9+6x4
=−3x9+12x8+6x4
Answer:
Explanation:
