Question

please answer this question with explanation please tomorrow maths exam is please do please add make your brain list please. * how did we get 900 + 60 + 60 + 4​

Answer 1

Answer:

${30}^{2} = (30 + 2)(30 + 2) \\ \: \: \: \: \: \: \: \: = 30(30 + 2) + 2(30 + 2) \\ \: \: \: \: \: \: \: \: = (30)(30) + (30)(2) + (30)(2) + (2)(2) \\ \: \: \: \: \: \: \: \: = 900 + 60 + 60 + 4 \\ \: \: \: \: \: \: \: \: = 900 + 124 \\ \: \: \: \: \: \: \: \: = 1024$

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Answer 2

Hi mate this:--

as given a(2+6)

then we first multiply a.2 that is 2a

and then a.6= 6a

Here ,

30(30+2)

= 30×30 + 30×2 +2(30+2)

=900+60+ 2×30 + 2×2

=900+60+60+4

=900+120+4

1024

Hope you understand ✔️✔️✔️