Question

(x+y+3)whole square​

Answer 1

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Answer:

➡x²+y²+9+2xy+6y+6x

Step-by-step explanation:

As we know that,

(a+b+c)² = a²+b²+c²+2ab+2bc+2ca

so,(x+y+3)=x² + y² + 3² + 2×x×y + 2×y×3 + 2×3×x

➡x²+y²+9+2xy+6y+6x

BRAINLIEST ❤