Question

2. Simplify.

(3a − 4)2

(Points : 1)
9a2 − 16
9a2 − 24a + 16
6a2− 24a + 8
92a − 7 + 16





Question 3. 3. (x − 4)(x2 − 3x − 9)
(Points : 1)
x3 − 7x2 − 21x + 36
x3 − 7x2 + 3x + 36
x3 + x2 − 3x − 36
x3 − 4x2 − 12x + 36

Answer 1

hint:
we have to apply this identity:
\[{\left( {a + b} \right)^2} = {a^2} + {b^2} + 2ab\]