Question

Factorise using appropriate identities: (2−6+9)−25

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

We know 49a2+70ab+25b2

=(7a)2+2(7a)(5b)+(5b)2

We know that x2+2xy+y2

=(x+y)

Here x=7a and y=5b

Therefore, 49a2+70ab+25b2

=(7a)2 +2(7a)(5b)+(5b)2

=(7a+5b)2

=(7a+5b)(7a+5b)

may be it's helpful for you