Question

1) If one quantity increases and the other related quantity also increases, then it is a type of proportion.

2) The expansion of (2a + 3b) is 4a² + + 9b²

3) If one quantity increases and the other related quantity decreases, then it is a type

of proportion.

4) (p+q) (p-q) =​

Answer 1

Answer:

1) Directly proportional.

2) (2a+3b)(2a−3b)(4a 2+9b2)

=(4a2-9b2 )(4a2+9b2)

(∵(a+b)(a−b)=a2 −b2)

=16a4−81b4.

3) inversely proportional.

Step-by-step explanation:

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