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product of sum and difference of
1.(5v-8)(5v+8)=
2.(9s+4)(9s-4)=
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Sagot :

Answer:

1.25v²-64

2.81s²-16

Step-by-step explanation:

1.(5v-8)(5v+8)=

=(5v)²-8²

=25v²-64

2.(9s+4)(9s-4)=

=(9s)²-4²

=81s²-16

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