Question

2. Expand and simplify: (x + 3y)2 + (3x - y)2.​

Answer 1

Step-by-step explanation:

$(x + 3y) ^{2} + (3x - y) ^{2}$

${x}^{2} + {9y}^{2} + 6xy + {9x}^{2} + {y}^{2} + 6xy$

${10x}^{2} + {10y }^{2} + 12xy$

I hope help you this answer

Answer 2

Solution :-

$\boxed{{10 {x}^{2} + 10 {y}^{2} + 12 xy}}$

step by step :-

$\bf{{➥ ( x + 3y ) {}^{2} + ( 3x + y ) {}^{2} }}$

$\bf{{➥ x {}^{2} + 9y {}^{2} + 6 xy + 9 x {}^{2} + y {}^{2} + 6xy}}$

$\bf{{➥ 10 x {}^{2} + 10 y {}^{2} + 12 xy}}$

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Hope you understand this answer mate : )