Answer
$25x^4-30x^2+9$
Work Step by Step
$$(5x^2-3)^2$$ $$=(5x^2-3)(5x^2-3)$$ $$=(5x^2\times 5x^2)+(5x^2\times (-3))+(-3\times 5x^2)+(-3\times (-3))$$ $$=25x^4-15x^2-15x^2+9$$ $$=25x^4-30x^2+9$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.