Question

Expand. If necessary, combine like terms. (3 + 4x) (3 - 4x)

Answer 1

• (3 + 4x) (3 - 4x)

We know the algebraic identity: (a - b)(a + b) = a^2 + b^2. Therefore, we should square 3 and 4x.

• = (3)^2 - (4x)^2
• 9 - 16x^2

Answer:

9 - 16x^2

Hope you could understand.

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