Answer:
Explanation:
(3x−5)(3x+5)
Multiplication can be transformed into difference of squares using the rule: (a−b)(a+b)=a
2
−b
2
.
(3x)
2
−5
2
Expand (3x)
2
.
3
2
x
2
−5
2
Calculate 3 to the power of 2 and get 9.
9x
2
−5
2
Calculate 5 to the power of 2 and get 25.
9x
2
−25