Simplify the product (5 −7r) (5 + 7r) .
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Answer:
=-49r^2+25
Step-by-step explanation:
(5 −7r) (5 + 7r)
=5^2-(7r)^2
=5^2-7^2r^2
=25-49r^2
=25-49r^2
=-49r^2+25
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