Question

Which is a counterexample that disproves the conjecture?

After completing several multiplication problems, a student concludes that the product of two binomials is always a trinomial.
(Points : 1)
A=(x+7)(x-7)
B=(x-1)(x+5)
C=(x+3)(x-6)
D=(x-5)(x-5)

Answer 1

\[\left( a+b \right)\left( a-b \right)=a^2-b^2\]

Answer 2

(x+a)(x-a) =x^2 -a^2

Answer 3

so is it A

Answer 4

can u tell me if its A, B, C, or D

Answer 5

clearly it is A