factorise- q no 18 for me plz
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(2a)2 +(-b) 2 +(5c)2_2*2a *-b - 2*-b*5c +2*5c*2a
=(2a-b+5c)2
=(2a-b+5c)(2a-b+5c).
=(2a-b+5c)2
=(2a-b+5c)(2a-b+5c).
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wait....
check it,....
check it,....
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aman113290:
wrong
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