3 times 5 is 15 and 15+15 = 30 so try the second one
(3a-5)((3a-5)
Determine which polynomial is a perfect square trinomial.
49x2 − 28x + 16
9a2 − 30a + 25
25b2 − 45b − 81
16x2 − 24x − 9
is it b pls help me
1 answer