Answer:
20. 1 2/25.
21. 32x^2 + 11.
Explanation:
20. (3/4^3 / (5/8)^2
27 /64 / 25/64
= 27/64 * 64/25
= 27/25
= 1 2 /25.
21.
4x *8x + 7 + 4
= 32x^2 + 11.
Answer: 20) a
21) a
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