Question

can anyone check my answers ?

Identify the factors of 9x^2 + 30x + 25.
(3x − 5)(3x − 5)
(3x + 5)(3x + 5)
(9x + 5)(x + 5)<---answer
(9x − 5)(x − 5)

Factor completely: −4x^2 + 16x − 24
−1(x^2 − 16x + 24)
−4(x^2 − 4x + 6)<---answer
−4x(x^2 − 4x + 6)
−4(x^2 + 4x − 6)

Identify the GCF of 6x^2y^2 − 8xy^2 + 10xy^3.
6x^2y^2<---answer
2x^2y
2xy^2
6xy^2

Factor Completely: 9x^2 − 25
(3x + 5)(3x − 5)
(3x − 5)(3x − 5)<---answer
(9x + 5)(x − 5)
(9x − 5)(x + 5)

Which polynomial is a perfect square trinomial?
49x^2 − 28x + 16
4a^2 − 20a + 25
25b^2 − 20b − 16
16x^2 − 24x − 9<