Question

expand (m+2n+3r) 2 please​

Answer 1

Answer:

.m + 2n + 3r)2 =(m)2 +(2n)2 +(3r)2 + [ 2 ×(m)× (2n)] + [ 2 ×(2n)×(3r)] + [ 2 ×(m)×(3r)]

{ ∵(a + b +c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac }

= m2 + 4n2 + 9r2 + [ 4mn ] + [ 12nr ] + [6mr ]

= m2 + 4n2 + 9r2 + 4mn + 12nr + 6mr

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

m2+4n2+9r2+4mn+12nr+6mr