factorise (a²-2a)-18(a²-2a)+45
Answers
Answered by
7
Answer:
( a² - 2a )² - 22( a² - 2a ) + 120
= (a² - 2a )² - 10(a2-2a)-12(a²-2a)+120
= (a²-2a)( a²-2a-10)-12(a² - 2a - 10 )
= ( a² - 2a - 10 )( a² - 2a )
= a( a - 2 ) ( a² - 2a - 10 )
Step-by-step explanation:
Answered by
0
Answer:
hi , we just have to factorise it
Step-by-step explanation:
put a^2 -2a=a
a^2-18a +45
a^2-15a-3a +45
a(a - 15)-3(a-15)
(a-15) ( a-3)
(a^2-2a-15 )(a^2-2a-3)
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