hlo plz solve it in ur notebook......
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Answered by
1
Answer:
Simply expand this using the identity (a-b)²=a²-2ab+b²
(5a-4b)²
=(5a)²-(2×5a×4b)+(4b)²
=25a²-40ab+16b²
Answered by
2
Answer:
25a² - 40ab + 16b²
Step-by-step explanation:
(5a-4b)²
this is in the form of (a-b)²
(a-b)² = a² -2ab + b²
(5a-4b)² = (5a)² - 2(5a)(4b) + (4b)²
= 25a² - 40ab + 16b²
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