Factorise 25(a-b) whole square - 81a square + 81 b square
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Answered by
9
Answer:
25(a-b)²-81a²+81b²
=>25(a²-2ab+b²)-81a²+81b²
=>25a²-50ab+25b²-81a²+81b²
=>-56a²+106b²-50ab
Answered by
0
Step-by-step explanation:
(25(a-b))2-81a2+81b2
25 square a-b of a-b - 81a2+81b2
625 of a2+b2 - same
625a2 +625b2. same
544a2+706b2
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