Question

what must be subtracted from a²+b²+2ab to get -4ab+2b²

Answer 1

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Answer 2

Step-by-step explanation:

Let the number be x

A/Q,

x- a²+b²+2ab = - 4ab+2b²

= x= - 4ab +2b²+a²+b²+2ab

=x= - 4ab+2ab +2b²+b²+a²

= x= - 2ab +3b²+a²