3 years ago

Simplify (y + 9)(y - 9). А у2 B у2 - 18 C y2 - 81 D у2 + 81

Mathematics

2 answers:

mestny [16]3 years ago

8 0

Answer:

Answer is y^2-81

Step-by-step explanation:

Varvara68 [4.7K]3 years ago

4 0

Answer:

Step-by-step explanation:

According to formula

(a+b)(a-b)=a²-b²

(y+9)(y-9)

=y²-(9)²

=y²-81

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