factorise step by step
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Step-by-step explanation:
25 (a + b)² - 49(a - b)²
Let's simplify it.
5x² - 7y²
(5x + 7y)(5x-7y)
(5(a + b)+7(a - b))(5(a + b)- 7(a - b))
(5a +5b+7a-7b)(5a +5b-7a+ 7b)
(12a-2b) (-2a + 12b)
Some of the Useful identity
• (a + b)² = a² + 2ab + b²
• (a - b)² =a² - 2ab + b²
• a² + b³ = (a + b)(a²- ab + b²).
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