Question

please solve these questions​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

1) $(3x)^{2} + 6x + 1 - (5y)^{2} \\(3x)^{2} - (5y)^{2} +6x + 1\\(3x + 5y)(3x - 5y) +6x +1$

2)

$[a^{2} + b^{2} + 2ab ]+ bc + ca\\(a+b)^{2} + 2bc + 2ca\\\\ (a+b)^{2} + 2(bc + ca)$

I hope it helps you...