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
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