Question

solve this plz for me​

Answer 1

Answer:

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Step-by-step explanation:

what should be added to

${a}^{2} + 2ab + {b}^{2}$

to get

$3 {a }^{2} - 3ab$

ANSWER............

$or \: {a}^{2} + 2ab + {b}^{2} = 3 {a}^{2} - 3ab \\ or \: {a}^{2} - 3 {a}^{2} + {b}^{2} = - 3ab - 2ab \\ or \: - 2 {a}^{2} + {b }^{2} = - 5ab \\ or- 2 {a}^{2} + {b }^{2} + 5ab$

the last step is the answer of the question.

Answer 2

Let added number be x

a^ +2ab+b^+x=3a^-3ab

x=3a^-a^-2ab -3ab-b^

x= 2a^ -5ab-b^

so, 2a^-5ab-b^ must be added