Answer:
9x^2-30x+25
Step-by-step explanation:
apply the perfect square formula (a-b)^2 = a^2 + b^2. In this case a is 3x and b is 5. (3x)^2-2 * 3x*5+5^2
simplify (3x)^2-2 * 3x*5+5^2 *9t^2-30t+25
and soon you will get the answer 9x^2-30x+25
