.. Factorise -
(a) 19a² + 70ab + 25b²
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Answered by
0
Step-by-step explanation:
Given:19a²+70ab+25b²
(49a²+70ab+25b²)–27a²[19a² is also equal to 49a²–27a²]
(7a+5b)–3(9a²)
(7a+5b)–3(3a)²
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Answered by
1
Step-by-step explanation:
49a²+70ab+25b²-30a²
=(7a)²+2*7a*5b+(5b)²-30a²
=(7a+5b)²-(√30a)²
=(7a+5b+√30a)(7a+5b-√30a)
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