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Vesna [10]
3 years ago
14

Expand and simplify the following expressions : 1.(a-5)(a-7)

Mathematics
1 answer:
aliya0001 [1]3 years ago
6 0

Answer:

<u>1. (a-5)(a-7) </u>

a2 - 12a + 35

<u>2. (x-2y)(3x+4)</u>

3x2 +4x - 6xy - 8y

<u>3. (4x+3y)(4x-3y)</u>

16x2 - 9y2

<u>4. (6x-7y)(6x+7y)</u>

36x2 - 49y2

(the twos after the letters means squared)

:)

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