Question

( a square - 4a ) ( a square - 4a - 1 ) - 20​

Answer 1

Answer:

$a^{4}$ - $8a^{3}$ + $15a^{2}$ + $4a$ - $20$

Step-by-step explanation:

($a^{2}$ - $4a$) (

= ( $a^{4}$ - 4$a^{3}$ - $a^{2}$ ) - (4

= $a^{4}$ - 4$a^{3}$ - 4

= $a^{4}$ - $8a^{3}$ + $15a^{2}$ + $4a$ - $20$

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