Louise’s answer is not correct. She is missing the term 30x3. When squaring a binomial, it is best to write the product of the binomial times itself. Then you can use the distributive property to multiply each term in the first binomial by each term in the second binomial. Louise also could have used the formula for a perfect square trinomial, which is found by squaring a binomial.
From the given algebra, we can say that;
Louise answer is not correct because she didn't expand the bracket the right way
We are given the expression;
(5x³ + 3)²
What this means is that we are multiplying the entire bracket by itself to get;
(5x³ + 3)² = (5x + 3)(5x + 3)
>> (5x * 5x) + (3 * 5x) + (3 * 5x) + (3 * 3)
>> 25x² + 30x + 9
This is different from what Louise did and so Louise answer is not correct.
Read more about Algebra expansion at; https://brainly.com/question/4344214
