Question

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Answer 1

Answer:

Step-by-step explanation:

22)

Perimeter of Parallelogram = 2 (sum of adjacent sides)

=> Perimeter = 2(6 + 4) = 20cm

23)

$a^2 - b^2 = (a+ b)(a-b)\\(2x+5)^2 - (2x - 5)^2 = ((2x+5) + (2x - 5)) ((2x + 5) -(2x-5))\\(2x+5)^2 - (2x - 5)^2 = (4x) (10) =40x$

Hope it helps :-)

Answer 2

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