Question

When asked to factor the trinomial 4x2 + 20x + 25, a student gives the answer (2x - 5)(2x - 5). what is one thing wrong with this answer?

Answer 1

When multiplied out, the middle term comes to -20x, not 20x. They should change the minus signs to plus signs :)

Answer 2

Answer:

The minus signs should be plus signs