Question

Expand please explain step wise.
$(m + 2n + 3r)2$
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Answer 1

Answer:

m² + 4n² + 9r² + 4mn+ 12nr + 6rm

Step-by-step explanation:

(m+2n+3r)²

= m²+(2n)²+(3r)²+2(m)(2n)+2(2n)(3r)+2(3r)(m)

= m² + 4n² + 9r² + 4mn+ 12nr + 6rm