Question

a square-2a+{5asquare-(3a-4asquare)}​

Answer 1

Step-by-step explanation:

a^2-2a+{5a^2-(3a-4a^2)}

a^2-2a+5a^2-3a+4a^2

10a^2-5a

5a(2a-1)

Answer 2

Step-by-step explanation:

$a^2 -2a+[5a^2-(3a-4a^2)]\\=a^2-2a+(5a^2-3a+4a^2)\\=a^2-2a+(9a^2-3a)\\=a^2-2a+9a^2-3a\\=10a^2 - 5a\\ =5a(2a-1)$

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