Question 641359
1.(3s+3)squared
= (3s+3)*(3s+3)
= 3s*(3s+3) + 3*(3s+3)
= {{{9s^2 + 9s + 9s + 9}}}
= {{{9s^2 + 18s + 9}}}
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Do the others the same way.
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2.(5z+1)squared
3.(10y+1)squared
4.(1+10y)squared
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3 & 4 are the same.
10y+1 = 1+10y