3. Find the products:
(i) (a - 7) (a + 7)
Answers
Answered by
5
Answer:
(a - 7) (a + 7)
= a²-7²
=a²-49
Answered by
1
Answer:
a-7=(-7a)
a+7+(7a)
(-7a)(7a)=-7a x 7a
= -49a
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