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Multiply (5a+7)(5a-7)
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Multiply (5a+7)(5a-7)

Multiply (5a+7)(5a-7)-example-1
User Cryo
by
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2 Answers

1 vote
=25a^2-49
Steps
1)Simplify:(5a)^2-7^2
2)evaluate:25a^2-49
User Brian Ellis
by
4.1k points
6 votes

Answer:

25a^2-49

Explanation:

1)use FOIL

F=first

O=out

I=inside

L=last

5a*5a+5a*-7+7*5a*7*-7

25a^2-35a+35a-49

25a^2-49

Hope this helps!

User Marvo
by
4.3k points
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