Question

evaluate: 25×25-15×15 by using identities


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Answer 1

A^3 + B^3 + C^3 = 3ABC IF A + B + C = 0
As we see that (-25) + 10 + 15 = 0
Hence (-25)^3+(10)^3+(15)^3 = 3 × (-25) × 10 × 15 = -75 × 150 = -11250

Answer 2

Answer:

625 - 225

=400 ans

Step-by-step explanation:

25×25=625

15×15=225

and next we subtract them = 400