Expand the expression $\left(3x^2+4z^3\right)^2$ using the square of a binomial
Take the square of the first term: $3x^2$
Twice ($2$) the product of the two terms: $3x^2$ and $4z^3$
Take the square of the second term: $4z^3$
Add the three results, and we obtain the expanded polynomial
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