Question

Помогите, умоляю, очень нужно...​

Answer 1

$\displaystyle\bf\\1)\\\\3m^{2} +6mn+3n^{2}=3(m^{2} +2mn+n^{2} )=3(m+n)^{2} \\\\m=4,8 \ \ ; \ \ n=5,2\\\\3(m+n)^{2} =3\cdot(4,8+5,2)^{2} =3\cdot 10^{2}=3\cdot 100=300\\\\\\2)\\\\10a^{2} -10b^{2} =10(a^{2} -b^{2} )=10(a-b)(a+b)\\\\a=63 \ \ ; \ \ b=37\\\\10(a-b)(a+b)=10\cdot(63-37)\cdot(63+37)=10\cdot 26\cdot 100=26000$