162-163 Напиши решение !!! Пожалуйста

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$162. \\ 1) (m+5) ^{2} -(m-5) ^{2} =m ^{2} +25+10m-m ^{2} -25+10m=20m \\ 2)(6-n )^{2} -(n+6) ^{2}=36+n ^{2} -12n-n^{2} -36-12n=-24 \\ 3)(x+y) ^{2} -(x-y) ^{2} = x^{2} +y^{2} +2xy- x^{2} -y ^{2} +2xy=4xy \\ 4)(2p-q) ^{2} -(q+2p) ^{2} =4p ^{2} +q ^{2} -4pq-q^{2} -4p ^{2} -4pq=-8pq \\ 5)(x-6)^{2} -9 x^{2} = x^{2} +36-12x-9 x^{2} =-8 x^{2} -12x+36 \\ 6) 4y ^{2} -(y+3) ^{2} =4y ^{2} -y ^{2} -9-6y=3y ^{2} -6y-9$

$163. \\ 1)81 x^{2} -9=0 \\ 81 x^{2} =9 \\ x^{2} = \frac{1}{9} \\ x=+- \frac{1}{9} \\ \\ 2)16-4y ^{2} =0 \\ -4y^{2} =-16 \\ y ^{2} =4 \\ y=+-2 \\ \\$

$3)16c^{2} -79=0 \\ 16c^{2} =49 \\ c ^{2} = \frac{49}{16} \\ c=+- \frac{7}{4} \\ \\ 4)64 x^{2} -25=0 \\ 64 x^{2} =25 \\ x^{2} = \frac{25}{64} \\ x=+- \frac{5}{8}$