expand (a+3b+4)^2
please help
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Answer:
a2+9b2+16+6ab+24b+8a
Step-by-step explanation:
(a+3b+4)^2
a^2+(3b)^2+(4)^2+2(a*3b+3b*4+4*a)
a^2+9b^2+16+6ab+24b+8a
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