Question

Factorise
0.4a² - 0.09b²​

Answer 1

Answer:

ANSWER = (0.2a+0.3b)(0.2a-0.3b)

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Answer 2

Answer:

The biosphere, also known as the ecosphere, is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth. The biosphere is virtually a closed system with regards to matter, with minimal inputs and outputs.

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