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mustachbrah
11.11.2021 •
Mathematics
What is 5m -2m = 3? With work provided
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Ответ:
Step by step solution:
5m - 2m = 33m = 3m = 3/3m = 1Ответ:
Step-by-step explanation:
#1.
(a + 2b)²
Using identity (x + y)² = x² + 2xy + y², we get:
= (a)² + (2b)² + 2 × (a) × (2b)
= a² + 4b² + 4ab
= a² + 4ab + 4b² Ans.
#2.
(5x - 3y)²
Using identity (a - b)² = a² - 2ab + b², we get:
= (5x)² + (3y)² - 2 × (5x) × (3y)
= 25x² + 9y² - 30xy
= 25x² - 30xy + 9y² Ans.
#3.
(3a + 4)(3a - 4)(9a² + 16)
Using identity (x + y)(x - y) = x² - y², we get:
= [(3a)² - (4)²][9a² + 16]
= (9a² - 16)(9a² + 16)
= (9a²)² - (16)²
= 81a⁴ - 256 Ans.