Answer:

1.) 9a^2 - 64b^2

2.) 9a^2 +12ab + 4b^2

Step-by-step explanation:

1.) THE DIFFERENCE OF SQUARES

(A+B) (A-B) = a^2 - b^2

(3a + 8b) (3a -8b)

(3a x 3a) (8b x - 8b)

9a^2 - 64b^2

2.) USE FOIL METHOD IN THE EQUATION (3a + 2b) (3a + 2b )

FIRT TERM = 3a x 3a = 9a^2

OUTER TERM = 3a x 2b = 6ab

INNER TERM = 2b x 3a = 6ab

LAST TERM = 2b x 2b = 2b^2

ADD THE OUTER TERM AND THE INNER TERM

9a^2 + 12ab + 2b^2

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