Question

Factorise
: 4a + b²+25 c²-4ab-10 bc+20ac​

Answer 1

Answer:(2a-b+5c)^2

Step-by-step explanation:

4a^2 + b^2 + 25c^2 - 4ab - 10bc + 20ca

= (2a)^2 + (-b)^2 + (5c)^2 + 2(2a)(-b) + 2(-b)(5c) + 2(5c)(2a)

= (2a-b+5c)^2

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